From: Philo, John <jphilo@amgen.com>
  To  : 'rasmb' <rasmb@bbri.harvard.edu>
  Date: Mon, 24 Mar 1997 11:30:29 -0800

new version of program XLGraph

RASMB'ers,

An updated version of my program XLGRAPH is now available for download
from the RASMB FTP site.  For those of you unfamiliar with this program,
a brief description and a summary of the new capabilities are attached
at the end of this message.

NOTE: 	Prior to 1997 this program was called XLAGraph, and used the file
naming conventions of the old DOS version of the Beckman XL-A data
acquisition program.  Formerly it was only distributed along with
SVEDBERG, but currently the two programs are distributed individually.

With the advent of the XL-I the name of the program was changed to
XLGraph to reflect its use with either absorbance or interference data.
Further, extensive alterations were needed to adjust to the file naming
and directory conventions used with Windows version of the Beckman data
acquisition program. XLGraph can read data using either the new or old
file-naming conventions.  However, the automatic graphing feature ONLY
works with the new naming convention.

IF YOU ARE STILL USING THE OLD DOS VERSION OF THE BECKMAN XL-A DATA
ACQUISTION SOFTWARE you may wish to retain a copy of the old XLAGRAPH
program.  XLGraph will no longer automatically detect and graph new data
files generated by the old DOS program (although it will still load and
graph the data manually).  The older version, XLAGRAPH, is still
available in an "olderversion" subdirectory under the SVEDBERG
directory.

The distributed file (xlgr9701.exe, 581 KB) is now a WinZip
self-extracting archive that will automatically expand the compressed
files and launch the installation program.  For details see the files
Install.txt and Whatsnew.txt

John Philo, Amgen

--------

Briefly, XLGraph is primarily intended as a rapid utility for: 

1. viewing and printing XL-A(I) scans, with or without baselines
subtracted

2. performing simple transformations of the data such as Ln(c) versus
radius^2 / 2 graphs

3. performing file utility functions such as baseline subtraction and
scan averaging, altering the comments stored with the data, and viewing
the .LOG file associated with a scan.

Many of these same things can, of course, also be done by the Beckman
Origin package.  Doing them in XLGraph is, however, often much more
rapid and convenient because of its ability to find and rapidly load
many scans (up to 100) at once.

New capabilities in this version:

(1) Able to read interference data from XL-I.

(2) Able to use the file naming conventions of the new Windows data
acquisition software or the old DOS version when loading multiple data
files for 
graphing.  Only the new naming convention is used for automatic graphing
functions.

(3) Maximum number of scans in a single graph increased to 100.

(4) Added the ability to edit comment lines stored with scans.

(5) Added the ability to display .LOG file associated with each scan, if
any.

(6) Added the ability to automatically load all channels associated with
a given cell (interference data only).

(7) Added the ability to add or subtract a constant from all the Y
values in data set or group of data sets, and write the altered data
back to disk.  This is mostly useful for refractometric data,
particularly when the fringe count for some scans is shifted by an
integer relative to others.

(8) Revised menu structure for graph formatting commands.

(9) Help file to explain graph formatting and printing features. (Help
file does not cover other aspects of the program, only the graphing
package common to XLGraph, SEDNTERP and SVEDBERG).

(10) New option on the "Printing Options" dialog box to force the use of
colors or black-and-white only.

(11) New "Format...Legend" option that allows editing the text and other
properties of the graph legends.