plscmap1: Set opaque RGB cmap1 colors values
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plscmap1: Set opaque RGB cmap1 colors values

plscmap1 ( r ,
  g ,
  b ,
  ncol1 );
 

Set opaque cmap1 colors (see the section called “Color Map1”) using RGB vector values. This function also sets the number of cmap1 colors. N.B. Continuous cmap1 colors are indexed with a floating-point index in the range from 0.0-1.0 which is linearly transformed (e.g., by plcol1) to an integer index of these RGB vectors in the range from 0 to ncol1-1. So in order for this continuous color model to work properly, it is the responsibility of the user of plscmap1 to insure that these RGB vectors are continuous functions of their integer indices.

r (PLINT_VECTOR, input)

A vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of red in the color as a continuous function of the integer index of the vector.

g (PLINT_VECTOR, input)

A vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of green in the color as a continuous function of the integer index of the vector.

b (PLINT_VECTOR, input)

A vector that represents (using unsigned 8-bit integers in the range from 0-255) the degree of blue in the color as a continuous function of the integer index of the vector.

ncol1 (PLINT, input)

Number of items in the r , g , and b vectors.

Redacted form: plscmap1(r, g, b)

This function is used in example 31.

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plscmap1_range: Set the cmap1 argument range for continuous color plots  Home  plscmap1a: Set semitransparent cmap1 RGBA colors.