| 1 | <html> |
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| 2 | <head> |
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| 3 | <META NAME="Author" CONTENT="Brian H. Toby"> |
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| 4 | <title>EXPGUI Tutorial #8</title> |
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| 5 | </head> |
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| 6 | <BODY BGCOLOR="#FFFFFF"> |
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| 7 | |
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| 8 | <A HREF=http://www.ncnr.nist.gov> |
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| 10 | alt="Link to NIST Center for Neutron Research home page" |
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| 11 | ALIGN=RIGHT></A> |
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| 12 | <A HREF=http://www.nist.gov> |
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| 15 | ALIGN=LEFT></A> |
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| 16 | <CENTER> |
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| 17 | <A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html"> |
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| 18 | <IMG SRC="tcltklogo100.gif" |
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| 19 | alt="Link to Tcl/Tk information"> |
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| 20 | </CENTER></A> |
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| 21 | <hr> |
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| 22 | |
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| 23 | <CENTER> |
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| 24 | <H1>GSAS Nickel example using EXPGUI (part 8)</H1> |
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| 25 | </CENTER> |
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| 26 | <H1> |
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| 27 | 8. Run GENLES |
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| 28 | </H1> |
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| 29 | At this point, we are ready to run GENLES to perform a least-squares |
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| 30 | refinement. GENLES can be run from the appropriate |
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| 31 | button on the button bar, by typing Alt-G, or using the GENLES command |
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| 32 | in the Powder or Xtal menus. |
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| 33 | |
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| 34 | <img src="genles1.gif"> |
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| 35 | <BR clear=left> |
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| 36 | As soon as GENLES is started, a box appears on the screen |
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| 37 | showing the refinement status. (See below). |
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| 38 | <BR clear=left> |
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| 39 | <img src="genles2.gif"> |
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| 40 | <P><BR clear=left> |
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| 41 | <img src="genles3.gif" align=left> |
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| 42 | As the refinement progresses, the LIVEPLOT window automatically |
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| 43 | updates, where the contents have |
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| 44 | <A HREF="nickel6.html#liveplot">previously been described.</A> |
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| 45 | |
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| 46 | <BR clear=left> |
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| 47 | <img src="powpref4.gif" align=left> |
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| 48 | When GENLES is finished and the window is closed, press "Load new" |
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| 49 | to cause the revised .EXP file to be read. (Pressing |
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| 50 | "Continue editing" would reject the results of the refinement.) |
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| 51 | <BR clear=left> |
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| 52 | <img src="lstview.gif"> |
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| 53 | To examine the results of the refinement in more detail, consult the |
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| 54 | .LST file. This can be examined using the LSTVIEW program. This program |
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| 55 | is shown above. Like LIVEPLOT, LSTVIEW is updated as the refinement |
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| 56 | progresses. |
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| 57 | <BR clear=left> |
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| 58 | The GSAS tutorial in the manual demonstrates use of POWPLOT to |
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| 59 | look at other aspects of the data, such as error analysis. This can |
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| 60 | be done by pressing the POWPLOT button or accessing POWPLOT from the |
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| 61 | menu bar. |
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| 62 | |
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| 63 | <BR clear=left><HR> |
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| 64 | Previous step: <A HREF="nickel7.html"> |
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| 65 | Setup for Least-Squares Refinement</A> |
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| 66 | <BR> |
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| 67 | Next step: <A HREF="nickel9.html"> |
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| 68 | Additional Work</A> |
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| 69 | |
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| 70 | <BR clear=left> |
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| 71 | <HR><p><a href="http://www.ncnr.nist.gov/staff/toby/">Brian Toby</a> (<a href="mailto:brian.toby@nist.gov">Brian.Toby@NIST.GOV</a>) |
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| 72 | <BR clear=left> |
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| 73 | $Revision: 211 $ $Date: 2009-12-04 23:02:15 +0000 (Fri, 04 Dec 2009) $ |
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| 74 | </body> |
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| 75 | </html> |
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