Set number of colors in cmap1, (re-)allocate color map1, and set default values if this is the first allocation (see the PLplot documentation).
Redacted form: plscmap1n(ncol1)
This function is used in examples 8,11,20,21.
- ncol1 (PLINT, input)
Number of colors that will be allocated in the map1 palette. If this number is zero or less, then the value from the previous call to plscmap1n(3plplot) is used and if there is no previous call, then a default value is used.