%N pglab %F $MIR/src/pglab.f
%D Write labels for x-axis, y-axis, and top of plot
%B
      SUBROUTINE PGLAB (XLBL, YLBL, TOPLBL)
      CHARACTER*(*) XLBL, YLBL, TOPLBL

 Write labels outside the viewport. This routine is a simple
 interface to PGMTXT, which should be used if PGLAB is inadequate.

 Arguments:
  XLBL   (input) : a label for the x-axis (centered below the
                   viewport).
  YLBL   (input) : a label for the y-axis (centered to the left
                   of the viewport, drawn vertically).
  TOPLBL (input) : a label for the entire plot (centered above the
                   viewport).
