visColormap {supraHex} | R Documentation

## Function to define a colormap

### Description

`visColormap` is supposed to define a colormap. It returns a function, which will take an integer argument specifying how many colors interpolate the given colormap.

### Usage

    visColormap(colormap = c("bwr", "jet", "gbr", "wyr", "br", "yr",
    "rainbow",
    "wb", "heat", "terrain", "topo", "cm"))

### Arguments

`colormap` | short name for the colormap. It can also be a function of 'colorRampPalette'

### Value

- `palette.name`: a function that takes an integer argument for generating that number of colors interpolating the given sequence

### Note

The input colormap includes:

- "jet": jet colormap

- "bwr": blue-white-red

- "gbr": green-black-red

- "wyr": white-yellow-red

- "br": black-red

- "yr": yellow-red

- "wb": white-black

- "rainbow": rainbow colormap, that is, red-yellow-green-cyan-blue-magenta

- Alternatively, any hyphen-separated HTML color names, e.g. "blue-black-yellow", "royalblue-white-sandybrown", "darkblue-lightblue-lightyellow-darkorange", "darkgreen-white-darkviolet", "darkgreen-lightgreen-lightpink-darkred". A list of standard color names can be found in http://html-color-codes.info/color-names

### See Also

`visColoralpha`

### Examples

    # 1) define "blue-white-red" colormap
    palette.name <- visColormap(colormap="bwr")

    # 2) use the return function "palette.name" to generate 10 colors spanning "bwr"
    palette.name(10)

[Package supraHex version 1.20.0 Index]