# brighten

## Purpose

Brighten or darken colormap.

## Synopsis

    brighten(beta)
    map = brighten(beta)
    newmap = brighten(cmap,beta)

## Description

`brighten(beta)` replaces the current colormap with a brighter or darker map of essentially the same colors. The modified colormap is brighter if `0 < beta < 1` and darker if`-1 < beta < 0`.

`brighten(beta)`, followed by `brighten(-beta)` restores the original map.

`map = brighten(beta)` returns a brighter or darker version of the current colormap without changing the display.

`newmap = brighten(cmap,beta)` returns a brighter or darker version of the colormap `cmap` without changing the display.

## See Also

    colormap, rgbplot

(c) Copyright 1994 by The MathWorks, Inc.