plsdiplz: Set parameters incrementally (zoom mode) that define current plot-space window

`plsdiplz`: Set parameters incrementally (zoom mode) that define current plot-space window
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#### `plsdiplz`: Set parameters incrementally (zoom mode) that define current plot-space window

`plsdiplz (` | xmin ,
| ymin ,
| xmax ,
| ymax `)`;

Set relative minima and maxima incrementally (zoom mode) that define the current plot-space window. This function has the same effect as `plsdiplt` if that function has not been previously called. Otherwise, this function implements zoom mode using the transformation `min_used = old_min + old_length*min` and `max_used = old_min + old_length*max` for each axis. For example, if `min = 0.05` and `max = 0.95` for each axis, repeated calls to `plsdiplz` will zoom in by 10 per cent for each call.

`xmin` (``PLFLT``, input)

  Relative (incremental) minimum in x.

`ymin` (``PLFLT``, input)

  Relative (incremental) minimum in y.

`xmax` (``PLFLT``, input)

  Relative (incremental) maximum in x.

`ymax` (``PLFLT``, input)

  Relative (incremental) maximum in y.

Redacted form: `plsdiplz(xmin, ymin, xmax, ymax)`

This function is used in example 31.

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