
plscmap0n: Set number of colors in cmap0 

DESCRIPTION:

    This function is used in examples 15,16,24. 

SYNOPSIS:

plscmap0n(ncol0)

ARGUMENTS:

    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. 
