heatmap attributes

Heatmaps: a grid of values drawn as colored cells on the GPU (one float texture with a colorscale lookup), with optional cell labels.

• Categories: cartesian, 2dMap, showLegend
• Plotly equivalent: heatmap
• Guide: heatmap chart page
• Used in examples: demos/dallas-weather/calendar-heatmap, demos/dallas-weather/month-year-heatmap, demos/dallas-weather/rain-heatmap, demos/dallas-weather/warming-stripes, demos/index-funds/asset-quilt, demos/index-funds/correlation-heatmap, demos/index-funds/monthly-heatmap, demos/index-funds/sector-heatmap, demos/science-basics/interference, demos/science-basics/periodic-table, demos/tirzepatide/surmount1-lipids, demos/tqqq-soxl/monthly-heatmap, heatmap/annotated, heatmap/basic, heatmap/columns-city, heatmap/columns-terrain, heatmap/columns, heatmap/dates, heatmap/interaction, heatmap/large, heatmap/period, heatmap/rangebreaks, heatmap/smooth, heatmap/uneven

Generated from the attribute schema (174 entries). Machine-readable: plot-schema.json.

Attribute tree

• type
• visible
• name
• uid
• showlegend
• legend
• legendgroup
• hovertext
• hoverinfo
• hovertemplate
• hoverlabel

  • bgcolor
  • bordercolor
  • font

    • family
    • size
    • color
  • align
  • namelength
• selectedpoints
• legendrank
• legendwidth
• legendgrouptitle

  • text
  • font

    • family
    • size
    • color
    • weight
    • style
• opacity
• meta
• customdata
• ids
• dataset
• uirevision
• styleRules
• xaxis
• yaxis
• z
• x
• x0
• dx
• xtype
• y
• y0
• dy
• ytype
• xperiod
• xperiod0
• xperiodalignment
• yperiod
• yperiod0
• yperiodalignment
• transpose
• text
• hoverongaps
• connectgaps
• xgap
• ygap
• zsmooth
• texttemplate
• textfont

  • family
  • size
  • color
  • weight
  • style
• xhoverformat
• yhoverformat
• zhoverformat
• zorder
• zauto
• zmin
• zmax
• zmid
• colorscale
• autocolorscale
• reversescale
• showscale
• colorbar

  • orientation
  • thicknessmode
  • thickness
  • lenmode
  • len
  • x
  • xref
  • xanchor
  • xpad
  • y
  • yref
  • yanchor
  • ypad
  • outlinecolor
  • outlinewidth
  • bordercolor
  • borderwidth
  • bgcolor
  • tickmode
  • nticks
  • tick0
  • dtick
  • tickvals
  • ticktext
  • ticks
  • ticklen
  • tickwidth
  • tickcolor
  • ticklabelposition
  • ticklabeloverflow
  • ticklabelstep
  • showticklabels
  • tickfont

    • family
    • size
    • color
    • weight
    • style
    • variant
    • textcase
    • lineposition
    • shadow
  • tickangle
  • tickformat
  • tickprefix
  • showtickprefix
  • ticksuffix
  • showticksuffix
  • separatethousands
  • exponentformat
  • minexponent
  • showexponent
  • title

    • text
    • font

      • family
      • size
      • color
      • weight
      • style
      • variant
      • textcase
      • lineposition
      • shadow
    • side
• coloraxis
• depth
• bevel

  • size
  • segments
• material

  • type
  • roughness
  • metalness
  • shininess
  • specular
  • emissive
  • emissiveintensity
  • reflectivity
  • envmapintensity
  • clearcoat
  • clearcoatroughness
  • transmission
  • ior
  • thickness
  • sheen
  • sheencolor
  • sheenroughness
  • iridescence
  • steps
  • matcap
  • castshadow
  • receiveshadow

type string

Trace type, e.g. 'scatter'. Defaults to 'scatter'.

• Type: string (non-empty)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

visible enumerated

Whether the trace is drawn. legendonly hides it but keeps its (toggleable) legend entry.

• Type: enumerated
• Values: true | false | "legendonly"
• Default: true
• Array OK: no
• Edit type: calc
• Animatable: no

name string

Trace name shown in the legend and hover labels. Defaults to trace N.

• Type: string
• Default: none
• Array OK: no
• Edit type: legend+plot
• Animatable: no

uid string

Stable identity used to match traces across updates, so reordered traces are moved instead of rebuilt.

• Type: string
• Default: none
• Array OK: no
• Edit type: plot
• Animatable: no

showlegend boolean

Whether this trace has a legend entry.

• Type: boolean
• Default: true
• Array OK: no
• Edit type: legend+layout
• Animatable: no

legend subplotid

The legend this trace's item is shown in: 'legend' (layout.legend), 'legend2' (layout.legend2), ….

• Type: subplotid (legend, legend2, legend3, …)
• Default: "legend"
• Array OK: no
• Edit type: legend+layout
• Animatable: no

legendgroup string

Traces in the same legend group toggle together.

• Type: string
• Default: ""
• Array OK: no
• Edit type: legend
• Animatable: no

hovertext data_array

Hover text per cell (2D like z); takes precedence over text in hover.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

hoverinfo flaglist

Which fields hover labels show; 'skip' also turns hover events off for this trace. Default 'all'.

• Type: flaglist
• Flags: "x", "y", "z", "text", "name" (combine with +)
• Also accepts: "all" | "none" | "skip"
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hovertemplate string

Template for hover labels, e.g. '%{x}: %{y:.2f}<extra></extra>' (d3-format / d3-time-format after : / |). Overrides hoverinfo.

• Type: string
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel

Hover label style for this trace. Unset fields fall back to layout.hoverlabel (so there are no trace-level defaults).

• Type: object
• Edit type: none

hoverlabel.bgcolor color

Label background. Default: the point color.

• Type: color
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.bordercolor color

Label border. Default: contrasting with the background.

• Type: color
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.font

Label font.

• Type: object
• Edit type: none

hoverlabel.font.family string

Font family.

• Type: string
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.font.size number

Font size in px.

• Type: number ≥ 1
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.font.color color

Font color.

• Type: color
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.align enumerated

Text alignment inside labels.

• Type: enumerated
• Values: "left" | "right" | "auto"
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

hoverlabel.namelength integer

Characters of the trace name shown (-1: all, 0: none).

• Type: integer ≥ -1
• Default: none
• Array OK: yes (one value per point)
• Edit type: none
• Animatable: no

selectedpoints any

Indices of the selected points (set by box/lasso selection, or programmatically). null clears the selection.

• Type: any
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

legendrank number

Sort key for legend entries: lower ranks come first (top, or left). Ties keep trace order; traces default to 1000.

• Type: number
• Default: 1000
• Array OK: no
• Edit type: legend
• Animatable: no

legendwidth number

Width of this trace's item in horizontal legends, overriding legend.entrywidth (same units). Default: its text's.

• Type: number ≥ 0
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle

Title of the legend group this trace belongs to.

• Type: object
• Edit type: legend

legendgrouptitle.text string

Title heading this trace's legend group.

• Type: string
• Default: ""
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle.font

Group title font. Unset fields come from legend.grouptitlefont.

• Type: object
• Edit type: legend

legendgrouptitle.font.family string

Font family.

• Type: string
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle.font.size number

Font size in px.

• Type: number ≥ 1
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle.font.color color

Font color.

• Type: color
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle.font.weight integer

Font weight: a CSS numeric weight (1–1000), normal or bold.

• Type: integer from 1 to 1000, or "normal" | "bold"
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

legendgrouptitle.font.style enumerated

Font style.

• Type: enumerated
• Values: "normal" | "italic"
• Default: none
• Array OK: no
• Edit type: legend
• Animatable: no

opacity number

Opacity of the whole trace.

• Type: number from 0 to 1
• Default: 1
• Array OK: no
• Edit type: style
• Animatable: yes

meta any

Arbitrary user data, available in text templates as %{meta}.

• Type: any
• Default: none
• Array OK: yes (one value per point)
• Edit type: plot
• Animatable: no

customdata data_array

Per-point user data, returned in events and available in hover templates.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

ids data_array

Per-point ids used to match points across animation frames.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

dataset string

Name of a figure-level dataset (figure.datasets). Data arrays, and per-point attributes whose values cannot start with @ (such as colors and sizes), may then reference its columns as '@column'; on string attributes such as text, '@…' stays literal text.

• Type: string (non-empty)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

uirevision any

While unchanged, user interaction state for this trace (legend visibility, selections) is kept across updates.

• Type: any
• Default: none
• Array OK: no
• Edit type: none
• Animatable: no

styleRules any

Conditional per-point styling as JSON (plan E8.5): [{ when: { y: { gt: 10 } }, set: { 'marker.color': 'gold' } }]. when tests fields of the point ('y', 'customdata[1]', 'pointNumber', …) with eq, ne, gt, gte, lt, lte, in, nin, between, regex, and, or and not; set gives per-point (arrayOk) attributes a value on the matching points. Later rules win; other points keep the trace's own value.

• Type: any
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

xaxis subplotid

The x axis this trace is plotted against: 'x' → layout.xaxis, 'x2' → layout.xaxis2.

• Type: subplotid (x, x2, x3, …)
• Default: "x"
• Array OK: no
• Edit type: calc
• Animatable: no

yaxis subplotid

The y axis this trace is plotted against: 'y' → layout.yaxis, 'y2' → layout.yaxis2.

• Type: subplotid (y, y2, y3, …)
• Default: "y"
• Array OK: no
• Edit type: calc
• Animatable: no

z data_array

Cell values: a 2D array (z[row][column], rows along y), or a 1D array with x and y columns (one value per point, placed on the grid of their distinct x and y values). Non-numeric entries are gaps.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

x data_array

X coordinates (numbers, dates or categories): one per column of z (cell centers; the cell edges are halfway between them) or one more (the cell edges). With 1D z, the x value of each point.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

x0 any

Center of the first column when x is not given (or xtype: 'scaled'); the next ones step by dx.

• Type: any
• Default: 0
• Array OK: no
• Edit type: calc
• Animatable: no

dx number

Step between columns when x is not given (milliseconds on date axes).

• Type: number
• Default: 1
• Array OK: no
• Edit type: calc
• Animatable: no

xtype enumerated

'array' (default with x): place the cells at x; 'scaled' (default without): at x0 + i × dx.

• Type: enumerated
• Values: "array" | "scaled"
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

y data_array

Y coordinates (numbers, dates or categories): one per row of z (cell centers; the cell edges are halfway between them) or one more (the cell edges). With 1D z, the y value of each point.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

y0 any

Center of the first row when y is not given (or ytype: 'scaled'); the next ones step by dy.

• Type: any
• Default: 0
• Array OK: no
• Edit type: calc
• Animatable: no

dy number

Step between rows when y is not given (milliseconds on date axes).

• Type: number
• Default: 1
• Array OK: no
• Edit type: calc
• Animatable: no

ytype enumerated

'array' (default with y): place the cells at y; 'scaled' (default without): at y0 + i × dy.

• Type: enumerated
• Values: "array" | "scaled"
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

xperiod any

Only on date or linear x axes: snap each x value to its period of this length (ms, or 'M<n>' months on date axes), positioned per xperiodalignment.

• Type: any
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

xperiod0 any

A period boundary for xperiod. Default: 2000-01-01 on date axes (a Sunday for weekly periods), 0 otherwise.

• Type: any
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

xperiodalignment enumerated

Where points sit within their xperiod.

• Type: enumerated
• Values: "start" | "middle" | "end"
• Default: "middle"
• Array OK: no
• Edit type: calc
• Animatable: no

yperiod any

Only on date or linear y axes: snap each y value to its period of this length (ms, or 'M<n>' months on date axes), positioned per yperiodalignment.

• Type: any
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

yperiod0 any

A period boundary for yperiod. Default: 2000-01-01 on date axes (a Sunday for weekly periods), 0 otherwise.

• Type: any
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

yperiodalignment enumerated

Where points sit within their yperiod.

• Type: enumerated
• Values: "start" | "middle" | "end"
• Default: "middle"
• Array OK: no
• Edit type: calc
• Animatable: no

transpose boolean

Swap rows and columns of a 2D z (z[column][row]).

• Type: boolean
• Default: false
• Array OK: no
• Edit type: calc
• Animatable: no

text data_array

Text per cell (2D like z, or 1D with column data): shown in hover labels and as %{text} in templates.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

hoverongaps boolean

Show hover labels on gaps (cells without a value), with an empty z.

• Type: boolean
• Default: true
• Array OK: no
• Edit type: none
• Animatable: no

connectgaps boolean

Fill gaps by interpolating their neighbours (Plotly’s Laplace fill). Default: true for 1D z with zsmooth, else false.

• Type: boolean
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

xgap number

Horizontal gap between cells, in px (only without zsmooth).

• Type: number ≥ 0
• Default: 0
• Array OK: no
• Edit type: style
• Animatable: no

ygap number

Vertical gap between cells, in px (only without zsmooth).

• Type: number ≥ 0
• Default: 0
• Array OK: no
• Edit type: style
• Animatable: no

zsmooth enumerated

Cell smoothing: none (false, flat cells), 'fast' (bilinear between cell centers by cell index; off on log axes and uneven grids, as in Plotly) or 'best' (bilinear between cell centers in data space). Drawn on the GPU either way.

• Type: enumerated
• Values: "fast" | "best" | false
• Default: false
• Array OK: no
• Edit type: style
• Animatable: no

texttemplate string

Label drawn in every cell: %{z}, %{x}, %{y} (cell centers), %{text}, with optional d3 formats (%{z:.1f}). Empty: no labels.

• Type: string
• Default: ""
• Array OK: no
• Edit type: plot
• Animatable: no

textfont

Font of the cell labels (texttemplate).

• Type: object
• Edit type: plot

textfont.family string

CSS font-family list. Default: layout.font.family.

• Type: string (non-empty)
• Default: none
• Array OK: no
• Edit type: plot
• Animatable: no

textfont.size number

Font size in CSS px, or 'auto': the largest size (up to layout.font.size) at which labels fit their cells.

• Type: number ≥ 1, or "auto"
• Default: "auto"
• Array OK: no
• Edit type: plot
• Animatable: no

textfont.color color

Text color. Default: black or white, whichever contrasts with the cell.

• Type: color
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

textfont.weight integer

Font weight: a CSS numeric weight (1–1000), normal or bold.

• Type: integer from 1 to 1000, or "normal" | "bold"
• Default: none
• Array OK: no
• Edit type: plot
• Animatable: no

textfont.style enumerated

Font style.

• Type: enumerated
• Values: "normal" | "italic"
• Default: none
• Array OK: no
• Edit type: plot
• Animatable: no

xhoverformat string

d3 number or date format of x values in hover labels. Default: the axis format.

• Type: string
• Default: ""
• Array OK: no
• Edit type: none
• Animatable: no

yhoverformat string

d3 number or date format of y values in hover labels. Default: the axis format.

• Type: string
• Default: ""
• Array OK: no
• Edit type: none
• Animatable: no

zhoverformat string

d3 number format of z values in hover labels (and %{z} in templates).

• Type: string
• Default: ""
• Array OK: no
• Edit type: none
• Animatable: no

zorder integer

Stacking order among the traces of a subplot: higher is drawn on top. At equal zorder, heatmaps draw below contours, bars and scatter traces (Plotly’s layer order).

• Type: integer
• Default: 0
• Array OK: no
• Edit type: plot
• Animatable: no

zauto boolean

Compute the color domain from the aggregated values. Defaults to false when both zmin and zmax are given.

• Type: boolean
• Default: true
• Array OK: no
• Edit type: style
• Animatable: no

zmin number

Value mapped to the first colorscale color (with zmax; turns zauto off).

• Type: number
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

zmax number

Value mapped to the last colorscale color (with zmin; turns zauto off).

• Type: number
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

zmid number

With zauto, widen the automatic domain so it is symmetric around this value (diverging data).

• Type: number
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

colorscale colorscale

Colorscale of the aggregated values: a name ('Viridis', 'RdBu', …), a list of colors, or [position, color] stops from 0 to 1. Default: Plotly's RdBu; the default holochart template uses its sequential neon plasma.

• Type: colorscale
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

autocolorscale boolean

Pick the colorscale from the sign of the color domain (layout.colorscale.sequential, sequentialminus or diverging) instead of colorscale.

• Type: boolean
• Default: false
• Array OK: no
• Edit type: style
• Animatable: no

reversescale boolean

Reverse the colorscale (the lowest value gets the last color).

• Type: boolean
• Default: false
• Array OK: no
• Edit type: style
• Animatable: no

showscale boolean

Show a colorbar for the colorscale (drawn by the colorbar component).

• Type: boolean
• Default: true
• Array OK: no
• Edit type: colorbars
• Animatable: no

colorbar

The colorbar of this colorscale (plan E5.3).

• Type: object
• Edit type: colorbars+layout

colorbar.orientation enumerated

Vertical bar (v, beside the plot) or horizontal bar (h, above or below).

• Type: enumerated
• Values: "h" | "v"
• Default: "v"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.thicknessmode enumerated

Unit of thickness: px, or a fraction of the plot width (v) / height (h).

• Type: enumerated
• Values: "fraction" | "pixels"
• Default: "pixels"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.thickness number

Thickness of the color bar.

• Type: number ≥ 0
• Default: 30
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.lenmode enumerated

Unit of len: px, or a fraction of the plot height (v) / width (h).

• Type: enumerated
• Values: "fraction" | "pixels"
• Default: "fraction"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.len number

Length of the colorbar along its axis, padding included (ypad / xpad).

• Type: number ≥ 0
• Default: 1
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.x number

Horizontal position (xref fraction). Defaults to 1.02 (v, paper), 1 (v, container) or 0.5 (h).

• Type: number
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.xref enumerated

Reference of x: the plot area (paper) or the whole figure.

• Type: enumerated
• Values: "container" | "paper"
• Default: "paper"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.xanchor enumerated

Which side of the colorbar sits at x. Defaults to left (v, paper), right (v, container) or center (h).

• Type: enumerated
• Values: "left" | "center" | "right"
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.xpad number

Horizontal padding, px.

• Type: number ≥ 0
• Default: 10
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.y number

Vertical position (yref fraction). Defaults to 0.5 (v), 1.02 (h, paper) or 1 (h, container).

• Type: number
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.yref enumerated

Reference of y: the plot area (paper) or the whole figure.

• Type: enumerated
• Values: "container" | "paper"
• Default: "paper"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.yanchor enumerated

Which side of the colorbar sits at y. Defaults to middle (v), bottom (h, paper) or top (h, container).

• Type: enumerated
• Values: "top" | "middle" | "bottom"
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.ypad number

Vertical padding, px.

• Type: number ≥ 0
• Default: 10
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.outlinecolor color

Color of the outline around the bar.

• Type: color
• Default: "#444"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.outlinewidth number

Outline width, px.

• Type: number ≥ 0
• Default: 1
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.bordercolor color

Border color of the colorbar box.

• Type: color
• Default: "#444"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.borderwidth number

Border width of the box, px.

• Type: number ≥ 0
• Default: 0
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.bgcolor color

Background of the box.

• Type: color
• Default: "rgba(0, 0, 0, 0)"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.tickmode enumerated

auto picks up to nticks round ticks; linear places ticks from tick0 every dtick; array uses tickvals/ticktext; sync aligns with the overlaid axis (reserved; behaves as auto). Defaults to array when tickvals is set, linear when dtick is set, else auto.

• Type: enumerated
• Values: "auto" | "linear" | "array" | "sync"
• Default: none
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.nticks integer

Maximum number of ticks for tickmode: auto (the actual number may be lower so steps stay round). 0 picks it from the axis length.

• Type: integer ≥ 0
• Default: 0
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tick0 any

Position of one tick for tickmode: linear (data units; a date on date axes, an exponent on log axes unless dtick is L<f>). Defaults to 0, or 2000-01-01 on date axes.

• Type: any
• Default: none
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.dtick any

Tick step. Linear axes: a positive number. Log axes: an integer n (a tick every n decades), L<f> (linear steps of f in data units, e.g. L0.5), D1 (every digit) or D2 (1, 2 and 5). Date axes: milliseconds, or M<n> for n months (M12 for years).

• Type: any
• Default: none
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickvals data_array

Tick positions for tickmode: array (data units).

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.ticktext data_array

Tick labels for tickvals. Missing entries are formatted as usual.

• Type: data_array (array or typed array)
• Default: none
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.ticks enumerated

Draw tick marks outside or inside the plot area, or not at all ('').

• Type: enumerated
• Values: "outside" | "inside" | ""
• Default: ""
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.ticklen number

Tick length in px.

• Type: number ≥ 0
• Default: 5
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickwidth number

Tick width in px.

• Type: number ≥ 0
• Default: 1
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickcolor color

Tick color. Defaults to color.

• Type: color
• Default: "#444"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.ticklabelposition enumerated

Tick labels outside the bar (away from it) or inside (over it); top/bottom (v) or left/right (h) move them beside their tick.

• Type: enumerated
• Values: "outside" | "inside" | "outside top" | "inside top" | "outside bottom" | "inside bottom" | "outside left" | "inside left" | "outside right" | "inside right"
• Default: "outside"
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.ticklabeloverflow enumerated

Hide labels past the figure or past the bar. Defaults to hide past domain for inside labels, else hide past div.

• Type: enumerated
• Values: "allow" | "hide past div" | "hide past domain"
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.ticklabelstep integer

Label every n-th tick only (tickmode auto and linear).

• Type: integer ≥ 1
• Default: 1
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.showticklabels boolean

Show tick labels.

• Type: boolean
• Default: true
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickfont

Tick-label font. Defaults to layout.font.

• Type: object
• Edit type: layout+plot

colorbar.tickfont.family string

CSS font-family list. The renderer uses the first family it can load and falls back through the list.

• Type: string (non-empty)
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.size number

Font size in CSS pixels.

• Type: number ≥ 1
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.color color

Text color.

• Type: color
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

colorbar.tickfont.weight integer

Font weight: a CSS numeric weight (1–1000), normal or bold.

• Type: integer from 1 to 1000, or "normal" | "bold"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.style enumerated

Font style.

• Type: enumerated
• Values: "normal" | "italic"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.variant enumerated

Capitals variant (CSS font-variant-caps). The SDF text renderer approximates small and petite caps with uppercase letters at a reduced size.

• Type: enumerated
• Values: "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.textcase enumerated

Letter case transform: upper, lower, word caps (first letter of each word), or normal.

• Type: enumerated
• Values: "normal" | "word caps" | "upper" | "lower"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.lineposition flaglist

Text decoration: under, over and/or through joined with + (e.g. under+over), or none.

• Type: flaglist
• Flags: "under", "over", "through" (combine with +)
• Also accepts: "none"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickfont.shadow string

CSS text-shadow behind the text (2px 2px 3px black; only the first shadow is drawn), none, or auto for a thin halo in the contrast color of the text.

• Type: string
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.tickangle angle

Tick-label rotation in degrees. auto rotates x-axis labels by the first autotickangles entry that avoids overlap.

• Type: angle (degrees), or "auto"
• Default: "auto"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickformat string

Tick-label format: a d3-format specifier for numbers (.2f, ~s, $,) or a d3-time-format specifier for dates (%b %Y), plus %{n}f for n digits of fractional seconds and %h for the half year. Empty picks a format automatically.

• Type: string
• Default: ""
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.tickprefix string

Text before each tick label.

• Type: string
• Default: ""
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.showtickprefix enumerated

Which tick labels get tickprefix.

• Type: enumerated
• Values: "all" | "first" | "last" | "none"
• Default: "all"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.ticksuffix string

Text after each tick label.

• Type: string
• Default: ""
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.showticksuffix enumerated

Which tick labels get ticksuffix.

• Type: enumerated
• Values: "all" | "first" | "last" | "none"
• Default: "all"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.separatethousands boolean

Always separate thousands (1,000). By default only numbers with 5 or more integer digits are separated.

• Type: boolean
• Default: false
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.exponentformat enumerated

How large and small numbers are written: none (1000000), e (1e+6), E (1E+6), power (1×10⁶), SI (1M), B (like SI but 1B for 10⁹).

• Type: enumerated
• Values: "none" | "e" | "E" | "power" | "SI" | "B"
• Default: "B"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.minexponent number

Smallest decimal exponent written in exponent form (SI/B and exponent formats); smaller magnitudes are written out in full.

• Type: number ≥ 0
• Default: 3
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.showexponent enumerated

Which tick labels show the exponent.

• Type: enumerated
• Values: "all" | "first" | "last" | "none"
• Default: "all"
• Array OK: no
• Edit type: colorbars+layout
• Animatable: no

colorbar.title

Colorbar title.

• Type: object
• Edit type: colorbars+layout

colorbar.title.text string

Colorbar title.

• Type: string
• Default: ""
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

colorbar.title.font

Title font. Defaults to layout.font with the tick-label family and 1.2 × its size.

• Type: object
• Edit type: layout+plot

colorbar.title.font.family string

CSS font-family list. The renderer uses the first family it can load and falls back through the list.

• Type: string (non-empty)
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.size number

Font size in CSS pixels.

• Type: number ≥ 1
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.color color

Text color.

• Type: color
• Default: none
• Array OK: no
• Edit type: style
• Animatable: no

colorbar.title.font.weight integer

Font weight: a CSS numeric weight (1–1000), normal or bold.

• Type: integer from 1 to 1000, or "normal" | "bold"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.style enumerated

Font style.

• Type: enumerated
• Values: "normal" | "italic"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.variant enumerated

Capitals variant (CSS font-variant-caps). The SDF text renderer approximates small and petite caps with uppercase letters at a reduced size.

• Type: enumerated
• Values: "normal" | "small-caps" | "all-small-caps" | "all-petite-caps" | "petite-caps" | "unicase"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.textcase enumerated

Letter case transform: upper, lower, word caps (first letter of each word), or normal.

• Type: enumerated
• Values: "normal" | "word caps" | "upper" | "lower"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.lineposition flaglist

Text decoration: under, over and/or through joined with + (e.g. under+over), or none.

• Type: flaglist
• Flags: "under", "over", "through" (combine with +)
• Also accepts: "none"
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.font.shadow string

CSS text-shadow behind the text (2px 2px 3px black; only the first shadow is drawn), none, or auto for a thin halo in the contrast color of the text.

• Type: string
• Default: none
• Array OK: no
• Edit type: layout+plot (inherited)
• Animatable: no

colorbar.title.side enumerated

Where the title goes relative to the bar. Defaults to top (v) or right (h).

• Type: enumerated
• Values: "right" | "top" | "bottom"
• Default: none
• Array OK: no
• Edit type: colorbars+layout (inherited)
• Animatable: no

coloraxis subplotid

Share a colorscale and domain with other traces through layout.coloraxis ('coloraxis', 'coloraxis2', …). Overrides this trace's colorscale attributes.

• Type: subplotid (coloraxis, coloraxis2, coloraxis3, …)
• Default: "coloraxis"
• Array OK: no
• Edit type: style
• Animatable: no

depth any

Cells as columns (Holochart extension, 2.5D): the height in CSS px of a column at zmax (or a percentage of the mean cell width, '300%'); heights grow linearly from 0 (from zmin with negative values), colored like the cells. 0 (default) draws the heatmap flat.

• Type: any
• Default: 0
• Array OK: no
• Edit type: plot
• Animatable: no

bevel

Rounded edges of extruded shapes (with depth).

• Type: object
• Edit type: plot

bevel.size number

Radius of the rounded front and side edges, CSS px (at most half the size).

• Type: number ≥ 0
• Default: 0
• Array OK: no
• Edit type: plot
• Animatable: no

bevel.segments integer

Segments of each rounded edge.

• Type: integer from 1 to 16
• Default: 3
• Array OK: no
• Edit type: plot
• Animatable: no

material

The material of extruded shapes (with depth): Plotly figures keep the default, plotly.

• Type: object
• Edit type: calc

material.type enumerated

How surfaces are shaded. plotly: Plotly's lighting model. flat: unlit, colors as given. basic, lambert, phong, standard, physical, toon, matcap: the three.js material of that name, lit by the lights of the scene (scene.lighting) or of the 2.5D view.

• Type: enumerated
• Values: "plotly" | "flat" | "basic" | "lambert" | "phong" | "standard" | "physical" | "toon" | "matcap"
• Default: "plotly"
• Array OK: no
• Edit type: calc
• Animatable: no

material.roughness number

Surface roughness (standard, physical). Default: lighting.roughness.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.metalness number

How metallic the surface is (standard, physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.shininess number

Sharpness of the highlights (phong). Default: from lighting.roughness.

• Type: number ≥ 0
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.specular color

Color of the highlights (phong). Default: lighting.specular gray.

• Type: color
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.emissive color

Color the surface emits regardless of the lights. Default black.

• Type: color
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.emissiveintensity number

Strength of emissive. Default 1.

• Type: number ≥ 0
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.reflectivity number

How much the environment is reflected (basic, lambert, phong, physical).

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.envmapintensity number

Strength of the environment's light (standard, physical). Default 1.

• Type: number ≥ 0
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.clearcoat number

A clear lacquer layer (physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.clearcoatroughness number

Roughness of the clear coat (physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.transmission number

Transmission, for glass-like surfaces (physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.ior number

Index of refraction (physical). Default 1.5.

• Type: number from 1 to 2.333
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.thickness number

Thickness of transmissive volumes, scene units (physical).

• Type: number ≥ 0
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.sheen number

Velvet-like sheen (physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.sheencolor color

Color of the sheen (physical).

• Type: color
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.sheenroughness number

Roughness of the sheen (physical). Default 1.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.iridescence number

Thin-film iridescence (physical). Default 0.

• Type: number from 0 to 1
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.steps integer

Number of shading bands (toon).

• Type: integer from 2 to 16
• Default: 3
• Array OK: no
• Edit type: calc
• Animatable: no

material.matcap string

URL of a matcap image (matcap): the surface takes its colors from it by normal direction.

• Type: string
• Default: none
• Array OK: no
• Edit type: calc
• Animatable: no

material.castshadow boolean

Cast shadows from the lights of scene.lighting with castshadow (onto three.js material types and the ground plane).

• Type: boolean
• Default: false
• Array OK: no
• Edit type: calc
• Animatable: no

material.receiveshadow boolean

Receive shadows (three.js material types only).

• Type: boolean
• Default: false
• Array OK: no
• Edit type: calc
• Animatable: no