There is a new version of GSAS for MS-DOS/Win95/98/NT now available. The
changes are to implement the adjustable "convergence criterion" in GENLES.
Thanks to Riccardo Vivani for pointing out the "v" option (that didn't
work) in the LS controls menu. This option now works as intended. The
convergence criterion is now just a test against the sum(shift/esd)**2 for
the variables in GENLES. Previously this test was also against the
sum(shift/esd)**2 of the parameters for each class (scales, profile coeff.,
background, atom parms., etc.). This latter set of tests have now been
removed. The second modification is a change to the presentation of the
plots in POWPLOT, etc. The values shown along each axis are now more
"natural" so that a 2-theta range will show "20.0 40.0 60.0 80.0 100.0
120.0" and hence will be closer to publication format. You should know that
the "eps" and "ps" output files from POWPLOT are easily modified to change
the text and the font. For example the line
/Cf {/Courier findfont} bind def
found near the top of the file could be changed to
/Cf {/TimesNewRoman-Bold findfont} bind def
to change all the printed font to Times New Roman Bold; this gives a very
spiffy plot. Explore this file and you'll find other easily changed items
that will improve its appearance.
Bob Von Dreele
