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README
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1991-05-11
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The programs contained on this diskette may be used and distributed freely.
However, we do ask that the author labels in the software not be removed or
altered and that credit be given to the authors in each application.
The authors accept no responsibility for any errors in this software or any
mishaps resulting from its use. It is the responsibility of the user to
adequately confirm the accuracy and applicability of the software.
The main piece of software include here is a Turbo Pascal (version 5.5)
procedure called GRAF. This is a very general graphics display and analysis
program (a "graphics editor") for xy data. It was originally developed
for the analysis of spectra acquired in a laboratory environment and
includes options especially suited to that application (e.g. wavelength/
wavenumber conversions, peak height and area determination, etc.). It is
equally well suited, however, for the analysis of any other data that can be
recorded in an xy format. Although less flexable in some respects than a
spreadsheet, it is substantially more efficient for many applications and
contains features not commonly found in a spreadsheet (e.g. a movable
crosshair, windowing of the displayed data, etc.).
GRAF resides in a separate unit called GRAFED and may be linked into Turbo
Pascal programs. A sample application is given by the program DISPLAY,
which reads in a set of xy data points from a file and presents that data
via the GRAF procedure. A sample data set (a sine wave) is contained in
the file TEST.DAT.
Note that GRAFED uses the monitor in graphics mode. The appropriate Turbo
Pascal device drivers (*.BGI) must therefore be available. The program
automatically searches for these files in the directorty d:\tp. If you
don't have such a directory, just make sure the BGI files are in your current
path. Alternatively, you can alter the DRIVERS constant in GRAFED and
recompile.
The graphics editor commands are best learned by trial and error. Once in
the editor, a complete listing of commands can be obtained by hitting the
"H" key.
The various units (other than GRAFED) on this disk contain many useful
procedures and functions for Turbo Pascal. These include ...
- Read procedures (IOFUNCS) that allow new values to be read in or
existing values to be retained if the user hits a carriage return.
Procedures for both text and graphics modes are given.
- A Dos shell command (IOFUNCS).
- Useful math functions (MATH).
- A general purpose setup of a set of axes for the screen (AXISLBL).
This unit can be used in data collection programs, for instance, to
display data as it's collected.
If you find this software useful and wish to make a donation to offset
distribution costs, donations may be sent to:
Roger Carlson
The James Franck Institute
The University of Chicago
5640 Ellis Ave.
Chicago, IL 60637
Those who make donations will, baring unforseen circumstances, receive
updated versions of this software as they become available.
Questions or comments may be sent to the address above or via email to
"carlson@gohan.uchicago.edu".
Enjoy.
Roger Carlson
May 1991