plgspa: Get current subpage parameters

plgspa (xmin,
 xmax,
 ymin,
 ymax);
 

Gets the size of the current subpage in millimeters measured from the bottom left hand corner of the output device page or screen. Can be used in conjunction with plsvpa for setting the size of a viewport in absolute coordinates (millimeters).

xmin (PLFLT_NC_SCALAR, output)

Returned value of the position of the left hand edge of the subpage in millimeters.

xmax (PLFLT_NC_SCALAR, output)

Returned value of the position of the right hand edge of the subpage in millimeters.

ymin (PLFLT_NC_SCALAR, output)

Returned value of the position of the bottom edge of the subpage in millimeters.

ymax (PLFLT_NC_SCALAR, output)

Returned value of the position of the top edge of the subpage in millimeters.

Redacted form: plgspa(xmin, xmax, ymin, ymax)

This function is used in example 23.