`plspal1`: Set the palette for cmap1 using the specified cmap1*.pal format file
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#### `plspal1`: Set the palette for cmap1 using the specified cmap1*.pal format file

`plspal1 (` | filename,
| interpolate`)`;

Set the palette for cmap1 using the specified cmap1*.pal format file.

`filename` (`const char *`, input)

  The name of the cmap1*.pal file, or an empty string to specify the default cmap1.pal file.

`interpolate` (`PLBOOL`, input)

  If this parameter is true, the columns containing the intensity index, r, g, b, alpha and alt_hue_path in the cmap1*.pal file are used to set the cmap1 palette with a call to `plscmap1la`. (The cmap1*.pal header contains a flag which controls whether the r, g, b data sent to `plscmap1la` are interpreted as HLS or RGB.)

  If this parameter is false, the intensity index and alt_hue_path columns are ignored and the r, g, b (interpreted as RGB), and alpha columns of the cmap1*.pal file are used instead to set the cmap1 palette directly with a call to `plscmap1a`.

Redacted form: `plspal1(filename, interpolate)`

This function is used in example 16.

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