plgcmap1_range: Get the cmap1 argument range for continuous color plots

`plgcmap1_range`: Get the cmap1 argument range for continuous color plots
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#### `plgcmap1_range`: Get the cmap1 argument range for continuous color plots

`plgcmap1_range (` | min_color,
| max_color`)`;

Get the cmap1 argument range for continuous color plots. (Use `plscmap1_range` to set the cmap1 argument range.)

`min_color` (``PLFLT_NC_SCALAR``, output)

  Returned value of the current minimum cmap1 argument.

`max_color` (``PLFLT_NC_SCALAR``, output)

  Returned value of the current maximum cmap1 argument.

Redacted form: `plgcmap1_range(min_color, max_color)`

This function is currently not used in any example.

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`plgchr`: Get character default height and current (scaled) height | Home | `plgcol0`: Returns 8-bit RGB values for given color index from cmap0