PGPLOT Module: PGCLOS -- close the selected graphics device


Close the currently selected graphics device. After the device has
been closed, either another open device must be selected with PGSLCT
or another device must be opened with PGOPEN before any further
plotting can be done. If the call to PGCLOS is omitted, some or all
of the plot may be lost.

[This routine was added to PGPLOT in Version 5.1.0. Older programs
use PGEND instead.]

Arguments none