Visual Map

Continuous visual map component that maps data values to visual properties (typically color). Required for heatmaps.

Usage

VisualMap(
  type = "continuous",
  min = NULL,
  max = NULL,
  precision = NULL,
  calculable = NULL,
  show = NULL,
  orient = NULL,
  in_range = NULL,
  out_of_range = NULL,
  left = NULL,
  right = NULL,
  top = NULL,
  bottom = NULL
)

Arguments

type

Character {"continuous", "piecewise"}: Visual map type.

min

Optional Numeric: Minimum value of the mapped data range.

max

Optional Numeric: Maximum value of the mapped data range.

precision

Optional Integer [0, Inf): Decimal places shown in colorbar labels and the draggable-handle tooltip. ECharts defaults to 0, which rounds labels to whole numbers — set this to match value_digits for accurate display.

calculable

Optional Logical: Whether to show drag handles for interactive range selection.

show

Optional Logical: Whether to display the visual map legend.

orient

Optional Character {"vertical", "horizontal"}: Orientation of the color bar.

in_range

Optional list: Visual encoding for in-range values. Typically list(color = c("blue", "white", "red")).

out_of_range

Optional list: Visual encoding for out-of-range values.

left

Optional Numeric or Character: Distance from the left of the container.

right

Optional Numeric or Character: Distance from the right of the container.

top

Optional Numeric or Character: Distance from the top of the container. For vertical heatmap colorbars, draw() aligns "middle" and "center" with the plotted data area.

bottom

Optional Numeric or Character: Distance from the bottom of the container.

Value

VisualMap object.

Details

Corresponds to ContinuousVisualMapOption in src/component/visualMap/ContinuousModel.ts. ECharts docs: https://echarts.apache.org/en/option.html#visualMap-continuous

Examples

VisualMap(type = "continuous", min = 0, max = 100, calculable = TRUE)

#> <rtemis.draw::VisualMap>
#>  @ type        : chr "continuous"
#>  @ min         : num 0
#>  @ max         : num 100
#>  @ precision   : NULL
#>  @ calculable  : logi TRUE
#>  @ show        : NULL
#>  @ orient      : NULL
#>  @ in_range    : NULL
#>  @ out_of_range: NULL
#>  @ left        : NULL
#>  @ right       : NULL
#>  @ top         : NULL
#>  @ bottom      : NULL