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Chapter 13. Reference Guide
XL*
X coordinate of the lower left hand corner of the current picture or zone.
YL*
Y coordinate of the lower left hand corner of the current picture or zone.
XH*
X coordinate of the upper right hand corner of the current picture or zone.
YH*
Y coordinate of the upper right hand corner of the current picture or zone.
Remarks:
– HPLGIV must be called after HPLOT.
– See also the HIGZ routine IGQWK.
CALL HPLINE
(XU, YU, N, CHOPT)
Action: Draws a polyline on the picture.
Parameter description:
XU
Array containing the X-coordinates of the points be to connected by straight lines.
YU
Array containing the Y-coordinates of the points be to connected by straight lines.
N
Dimension of the arrays XU and YU. Note that N-1 lines will be drawn.
CHOPT
CHARACTER variable determining the coordinate system of the XU, YU coordinates:
’ ’
’C’
means that the coordinates are expressed in histogram coordinates (of the last drawn histogram).
(or ’CM’ for compatibility) means that the coordinates are expressed in centimeters.
Remarks:
–
–
–
–
–
If CHOPT = ’CM’, HPLGIV can be used to determine the boundary of the current picture.
The line type can be changed with parameter DMOD of HPLSET.
The limit N<1002 must be satisfied2.
See also the HIGZ routine IPL.
HPLINE must be called after HPLFRA or HPLOT.
CALL HPLINT
(IWTYP)
Action: Initialises the HPLOT package and especially the graphic package environment (HIGZ).
Parameter description:
IWTYP
2
Workstation type.See appendix B for the list of valid workstation types. If IWTYP=0 no graphics
workstation will be open. This special value should be used when working in batch mode. In
this case, to direct output to a metafile, use IGMETA.
to parameter NMAX defined in the Patchy KEEP sequence HPL11 in the HPLOT source PAM file.