plgfam: Get family file parameters

The PLplot Plotting Library: Programmer's Reference Manual
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### `plgfam`: Get family file parameters

`plgfam` (fam, num, bmax);

Gets information about current family file, if familying is enabled. See the Section called Family File Output in Chapter 3 for more information.

`fam` (`PLINT *`, output) Pointer to variable with the Boolean family flag value. If nonzero, familying is enabled. `num` (`PLINT *`, output) Pointer to variable with the current family file number. `bmax` (`PLINT *`, output) Pointer to variable with the maximum file size (in bytes) for a family file.

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