The PLplot Plotting Library: Programmer's Reference Manual
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### `plgxax`: Get x axis parameters

`plgxax` (digmax, digits);

Returns current values of the ``digmax`` and ``digits`` flags for the x axis. ``digits`` is updated after the plot is drawn, so this routine should only be called after the call to `plbox` (or `plbox3`) is complete. See the Section called Annotating the Viewport in Chapter 3 for more information.

`digmax` (`PLINT *`, output) Pointer to variable with the maximum number of digits for the x axis. If nonzero, the printed label has been switched to a floating point representation when the number of digits exceeds ``digmax``. `digits` (`PLINT *`, output) Pointer to variable with the actual number of digits for the numeric labels (x axis) from the last plot.

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`plgvpw`: Get viewport limits in world coordinates | Up | `plgyax`: Get y axis parameters