The PLplot Plotting Library: Programmer's Reference Manual
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### `plscmap0n`: Set number of colors in color map0

`plscmap0n` (ncol0);

Set number of colors in color map0 (see the Section called Color Map0 in Chapter 3). Allocate (or reallocate) color map0, and fill with default values for those colors not previously allocated. The first 16 default colors are given in the `plcol0` documentation. For larger indices the default color is red.

The drivers are not guaranteed to support more than 16 colors.

`ncol0` (`PLINT`, input) Number of colors that will be allocated in the map0 palette. If this number is zero or less, then the value from the previous call to `plscmap0n` is used and if there is no previous call, then a default value is used.

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`plscmap0`: Set color map0 colors by 8-bit RGB values | Up | `plscmap1`: Set color map1 colors using 8-bit RGB values