| 1 | <html> |
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| 2 | <head> |
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| 3 | <title>Intro to EXPGUI |
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| 4 | </title> |
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| 5 | </head> |
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| 6 | <body> |
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| 7 | |
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| 8 | <center> |
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| 9 | <h1> |
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| 10 | Intro to EXPGUI</h1></center> |
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| 11 | What is EXPGUI?<img SRC="2s.gif" align=RIGHT> |
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| 12 | <blockquote>EXPGUI is a graphical user interface (GUI) editor for GSAS |
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| 13 | experiment (.EXP) files and shell which allows all the other GSAS programs |
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| 14 | to be executed with a GUI, similar to the <a href="http://rrdjazz.nist.gov/~toby/tkgsas.html">tkGSAS</a> |
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| 15 | shell. EXPGUI is not a replacement for the GSAS program EXPEDT, as there |
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| 16 | are many things that EXPGUI cannot do. I have tried to put most of the |
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| 17 | actions that I use most frequently and that could be easily accomodated |
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| 18 | into EXPGUI.</blockquote> |
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| 19 | So what can EXPGUI do? |
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| 20 | <blockquote> |
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| 21 | <dt> |
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| 22 | <i>Phase parameters</i>: EXPGUI can edit the cell and atomic parameters |
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| 23 | as well as the cell and atomic damping and refinement flags.</dt> |
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| 24 | |
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| 25 | <dt> |
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| 26 | <i>Histogram parameters</i>: Scale factor, background, diffractometer constants, |
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| 27 | phase fractions, profile terms can all be changed.</dt> |
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| 28 | |
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| 29 | <dt> |
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| 30 | <i>Least-Squares options:</i> control the number of cycles, the print options |
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| 31 | and F<sub>obs</sub> extraction parameters.</dt> |
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| 32 | </blockquote> |
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| 33 | |
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| 34 | <p><br>So what can't EXPGUI do? |
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| 35 | <blockquote>Much more than it can do. At this time, EXPGUI can't be used |
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| 36 | to add a histogram or phase to a .EXP file; nor can it add or delete atoms, |
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| 37 | It cannot create or edit soft or hard constraints. It cannot be used on |
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| 38 | phases with magnetic scattering or on single-crystal histograms. It can't |
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| 39 | even change the profile function number. |
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| 40 | <p>I hope to add some of these capabilities in the future, but EXPEDT is |
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| 41 | a huge program and it is unlikely that anyone will replace it any time |
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| 42 | soon. Adding atoms, phases, histograms will likely require some FORTRAN |
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| 43 | coding which makes it hard to support all the various platforms unless |
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| 44 | LANSCE gets involved.</blockquote> |
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| 45 | |
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| 46 | <p><br>What type of computers will EXPGUI run on? |
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| 47 | <blockquote>EXPGUI requires Tcl/Tk. While that is somewhat restrictive, |
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| 48 | it still means that EXPGUI will run on many more platforms than GSAS does. |
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| 49 | Most of the development has been done in LINUX with some testing on SGI |
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| 50 | and Windows-95 systems. I expect that EXPGUI will run on all platforms |
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| 51 | where GSAS does (except perhaps VMS).</blockquote> |
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| 52 | |
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| 53 | <p><br>Who is to blame for EXPGUI? |
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| 54 | <blockquote>The initial version of the GUI part of EXPGUI was created by |
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| 55 | Jonathan Wasserman (thanks Jon!) <a href="http://rrdjazz.nist.gov/~toby/">Brian |
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| 56 | Toby</a> is irresponsible for the rest.</blockquote> |
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| 57 | |
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| 58 | <p><br>EXPGUI would be much more of use to me if.... |
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| 59 | <blockquote>Gee, you want to add some features... Great! You have all the |
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| 60 | EXPGUI sources and Tcl/Tk is free. Oh, you want me to do it. Well, I might |
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| 61 | get to it if you ask. I am looking for good ideas on how to design GUI's |
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| 62 | for different aspects of experiment editing, for example:how to code and |
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| 63 | edit hard constraints with an attractive, intuitive and compact GUI.</blockquote> |
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| 64 | |
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| 65 | <p><br> |
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| 66 | <hr WIDTH="100%"> |
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| 67 | <p>Neither the author nor the U.S. Government makes any warranty, expressed |
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| 68 | or implied, or assumes any liability or |
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| 69 | <br>responsibility for the use of this information or the software described |
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| 70 | here. Brand names cited here are used for |
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| 71 | <br>identification purposes and do not consitute an endorsement by NIST. |
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| 72 | <p><a href="http://rrdjazz.nist.gov/~toby/">Brian Toby</a> (<a href="mailto:brian.toby@nist.gov">Brian.Toby@NIST.GOV</a>) |
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| 73 | <br>$Revision: 25 $ $Date: 2009-12-04 22:59:07 +0000 (Fri, 04 Dec 2009) $ |
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| 74 | </body> |
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| 75 | </html> |
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