source: trunk/tutorial1/nickel6.html @ 193

Last change on this file since 193 was 186, checked in by toby, 12 years ago

# on 2000/06/01 16:07:21, toby did:
correct typos

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  • Property rcs:date set to 2000/06/01 16:07:21
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1<html>
2<head>
3   <META NAME="Author" CONTENT="Brian H. Toby">
4   <title>EXPGUI Tutorial #6</title>
5</head>
6<BODY BGCOLOR="#FFFFFF">
7
8<A HREF=http://www.ncnr.nist.gov>
9<IMG SRC="http://www.ncnr.nist.gov/images/ncnrtrans.gif" 
10alt="Link to NIST Center for Neutron Research home page"
11ALIGN=RIGHT></A>
12<A HREF=http://www.nist.gov>
13<IMG SRC="http://www.ncnr.nist.gov/images/webidblue_2lineright.gif" 
14alt="Link to National Institute of Standards & Technology home page"
15ALIGN=LEFT></A>
16<CENTER>
17<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
18<IMG SRC="tcltklogo100.gif" 
19alt="Link to Tcl/Tk information">
20</CENTER></A>
21<hr>
22
23<CENTER>
24<H1>GSAS Nickel example using EXPGUI (part 6)</H1>
25</CENTER>
26<H1>
276. Plot data using POWPLOT or LIVEPLOT
28</H1>
29At this point in the GSAS tutorial in the manual,
30program POWPLOT is used to plot the diffraction data. This
31is done by pressing POWPLOT button in the button bar, or
32by pressing the POWPLOT menu item in either the Powder menu
33or the Graphs menu. The input supplied to POWPLOT and the
34results are the same as what is shown in the menu, so this will
35not be shown.
36<P>
37EXPGUI does offer another way to display diffraction data, LIVEPLOT.
38Similar to the way POWPREF was run in the previous step,
39LIVEPLOT can be started by pressing LIVEPLOT button in the button bar,
40or by pressing the LIVEPLOT menu item in the Graphs menu.
41<P>
42<img src="liveplot1.gif" align=left>
43Since no cycles of refinement have been run,
44after LIVEPLOT generates a blank screen, it must be
45triggered to read the POWPREF output by pressing the "Update Plot"
46item in the File menu.
47A plot similar to the one to the left.
48<BR clear=left><P>
49<img src="liveplot2.gif" align=left>
50Note that the region plotted can be changed by clicking with the left
51mouse button, two outline the region to be shown, as seen to the left.
52When the left mouse button is pressed a second time, the graph is "zoomed in,"
53as is shown below.
54To "zoom out" to the previous region, press the right mouse button.
55<BR clear=left><P>
56<img src="liveplot3.gif">
57<P>
58<img src="liveplot4.gif" align=left>
59Reflection positions can be marked, using the File/Tickmarks menu.
60<BR clear=left><P>
61<img src="liveplot5.gif" align=left>
62Reflection indices can be displayed by pressing the "h" (or "H") key in the
63position of the reflection to be labeled. The size and time before
64the reflection labels are removed is determined by values in the Options/HKL labeling menu.
65<BR clear=left><P>
66There are many other options available in LIVEPLOT in the Options menu. The
67Appearance and location of the tickmarks can be set. The symbol and symbol size
68used for observed data can be selected.
69The X and Y units can be changed to Q or d-space values. Background
70can be subtracted. The legend can be removed from the plot.
71
72<BR clear=left><HR>
73Previous step: <A HREF="nickel5.html">
74Run POWPREF</A>
75<BR>
76Next step: <A HREF="nickel7.html">
77Setup for Least-Squares Refinement</A>
78
79
80<BR clear=left>
81<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>)
82<BR clear=left>
83$Revision: 186 $ $Date: 2009-12-04 23:01:50 +0000 (Fri, 04 Dec 2009) $
84</body>
85</html>
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