cmap

cmap(data, robust?, cmapSeq?, cmapBool?, cmapDiv?): any

Defined in: packages/pleco-xa/src/scripts/xa-display.js:107

Get a default colormap from the given data

Determines an appropriate colormap based on data characteristics:

• Sequential colormaps for non-negative data
• Boolean colormaps for binary data
• Diverging colormaps for centered data

Parameters

data

any[] | Float32Array<ArrayBufferLike> | number[][]

Input data (1D or 2D array)

robust?

boolean = true

If true, use 2nd/98th percentiles for range detection

cmapSeq?

string = 'magma'

Sequential colormap name (default: ‘magma’)

cmapBool?

string = 'gray_r'

Boolean colormap name (default: ‘gray_r’)

cmapDiv?

string = 'coolwarm'

Diverging colormap name (default: ‘coolwarm’)

Returns

any

Colormap configuration with {type, name, colors, map function}

Examples

// Sequential data (spectrogram)
const spec = new Float32Array([0.1, 0.5, 0.9, 1.2]);
const cmap = cmap(spec);  // Returns 'magma' sequential colormap

// Centered data (chromagram difference)
const diff = new Float32Array([-1.0, -0.5, 0.0, 0.5, 1.0]);
const cmap = cmap(diff, true, 'magma', 'gray_r', 'coolwarm');  // Returns 'coolwarm' diverging