110546     HP-7225A HP-GL Pen Plotter Library  Version: May 1982
 
Submitted by: Ken Sutin, Case Western Reserve University, Cleveland,
OH
 
Operating System: RT-11 V4.0  Source Language: FORTRAN IV, MACRO-11,
RATFOR Y20.5  Software Required: RATFOR useful but not necessary.
Hardware Required: HP-7225A Pen Plotter  Keywords: Graphics, Hewlett
Packard, Plotting
 
Abstract: This software consists of a collection of subroutines
that have been written for the Hewlett Packard 7225A pen
plotter. Included in this software is support for the
inherent HP Graphics Language Instruction Set and
several other high level functions as described below.
Mapping from virtual user units to physical plotter
units occurs with respect to the specified plotter units
(e.g. in, cm), the plot origin and a global plotting
factor, which allows the entire plot to be reduced or
enlarged by calling one subroutine. Data can be plotted
by specification of coordinate pairs, or a single data
vector may be plotted as a function of a fixed
X-increment (e.g. if the data are interval related).
Coordinate data to be plotted may be specified in
integer or floating point form, and the data may be
scaled by an offset and a gain factor. Some other
functions that have been written are: move to
coordinate, draw to coordinate, label, axis, histogram
and digitize.
 
Media (Service Charge Code): Two RX01 Diskettes (KB)  Format: RT-11,
600' Magnetic Tape (MA)  Format: RT-11