colorbar_vertical: Generate a vertical colorbar image

In scimesh: Headless Publication-Quality 3D Mesh Rendering Engine

Generate a vertical colorbar image

Description

Creates a vertical colorbar as a 4-channel RGBA array.

Usage

colorbar_vertical(
  colormap,
  n_colors = 256L,
  width = 80L,
  height = 600L,
  ticks = NULL,
  tick_labels = NULL,
  data_range = c(0, 1),
  label_cex = 1,
  title = NULL,
  background = c(1, 1, 1, 1)
)

Arguments

colormap	A vector of colors or a function returning colors.
n_colors	Number of discrete color segments in the gradient.
width	Output width in pixels.
height	Output height in pixels.
ticks	Numeric vector of tick positions in data units. If NULL, ticks are computed automatically via pretty() restricted to the data range.
tick_labels	Character vector of tick labels.
data_range	The data range that ticks are specified in.
label_cex	Label size multiplier.
title	Optional title string drawn to the right of the color strip.
background	Background RGBA color (0-1 scale).

Value

A 3D array of dimensions (height, width, 4) with values in [0, 1].

Examples

cbar <- colorbar_vertical(viridis_colormap, data_range = c(0, 100),
    title = "Count")
dim(cbar)

scimesh documentation built on Aug. 9, 2026, 9:07 a.m.