110727     SCPLT: CRT Screen Plot Program  Version: V1, March 1984
Submitted by: Brian Guthrie, LRSM, Philadelphia, PA
Operating System: RT-11SJ V4.0  Source Language: FORTRAN IV  Memory
Required: 8707W  Keywords: Graphics, Plotting
Abstract: The package of programs which this document describes
can be used to create plots of up to four channels of
data on any terminal which can be switched from 80 to
132 column format. The plots are oriented with the
Y-axis along the left hand margin and the X-axis at the
bottom of the CRT screen or printer paper. Useful
parameters associated with each data channel are typed
or printed out at the top of each plot. The plots are
necessarily not of high resolution but do provide useful
information in a preliminary plotting analysis of data.
A demonstration program is also included with this
The package of programs was written in FORTRAN IV on a
PDP 11/23 running under RT-11SJ V4.0. The specific
programs of this package include: 1) DK:DOC.TXT, this
document; 2) DK:SCPLT.FOR, a program which accesses the
data file and interactively creates plots according to
several options selected by the user; 3) DK:CH.FOR, a
subroutine called by DK:SCPLT.FOR and used to plot
individual channels against time; and 4) DK:CH1.FOR, a
subroutine called by DK:SCPLT.FOR and used to plot
individual channels against each other.
All of these programs including any parameter and data
file manipulations are assumed to be located on the
default device DK: with assignment of logical unit = 3.
The program package is currently set up as a CRT screen
plotting package but the user can easily alter the
package to produce printer plots.
Media (Service Charge Code): One RX01 Diskette (KA)  Format: RT-11,
600' Magnetic Tape (MA)  Format: RT-11

The PDP-11 DECUS Software Index
The PDP-11 Home Page
Tim Shoppa <shoppa@trailing-edge.com>
Created: December 26, 1998