R: Different Useful Color Palettes

color_palettes {seriation} | R Documentation

## Different Useful Color Palettes

### Description

Defines several color palettes for `pimage`, `dissplot` and `hmap`.

### Usage

    bluered(n, bias = 1)
    greenred(n, bias = 1)
    grays(n, power = 1)
    greys(n, power = 1)

### Arguments

`n` | number of different colors produces.
`bias` | a positive number. Higher values give more widely spaced colors at the high end.
`power` | control parameter determining how luminance should be increased (1 = linear, 2 = quadratic, etc.).

### Details

`bluered` creates a blue-red color palette.

`greenred` creates a green-red color palette.

`greys` and `grays` creates gray scales.

See `colorRampPalette` to create your own color palettes.

### Value

A vector with `n` colors.

### Author(s)

Michael Hahsler

### See Also

`colorRampPalette`, `pimage`, `dissplot`, `hmap`.

### Examples

    pimage(rbind(1:100))
    pimage(rbind(1:100), col = greys(100, power=2))
    pimage(rbind(1:100), col = bluered(100))
    pimage(rbind(1:100), col = bluered(100, bias = 2))
    pimage(rbind(-100:100), col = greenred(10))

    ## create your own color palettes
    ## red to green (with 10 colors)
    pimage(rbind(1:100),
      col = colorRampPalette(colors = c("red", "yellow", "green"))(10))
    ## white to blue (with 100 colors)
    pimage(rbind(1:100),
      col = colorRampPalette(colors = c("white", "blue"))(100))

[Package seriation version 1.2-8 Index]