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If "Multiple Histogram Selection" mode is set to "All", this pane is disabled. For other settings of this mode, groups of histograms can be selected and modified collectively.
If the EXPTOOL program (see the installation instructions) is installed, a button for adding histograms will appear on the bottom right on this pane, as seen below. If the program is not properly installed, no errors occur, but the button does not appear.
Note that the order that histograms appear in this pane is determined by the "Sort histograms by" option in the Options Menu.
The "Fit Background Graphically" button is displayed only when a single
histogram is selected for background editing. When this button is
pressed, the BKGEDIT program is
called to fit a background function to user-input fixed background points.
See the BKGEDIT documentation for more
information.
In the case where diffraction data will be input, a data file and an instrument parameter file must be selected using the "Select File" buttons. The limit for reflection generation (maximum energy or two-theta, or minimum d-space or TOF) must be entered, as well as the units. If more than one bank is defined, either in the data file or in the instrument parameter file, the bank must be selected as well. Note that the data range can be edited at a later time using the EXCLEDT utility.
To view a plot of a data file, so that the range of the data may be viewed, the RAWPLOT program may be invoked using the "Run RAWPLOT" button. Note that EXPGUI cannot communicate the names of the data and instrument parameter files to RAWPLOT, so they must be reentered.
When the dummy histogram option is selected, diffraction data can
be simulated based a set of experimental constants
described in an instrument parameter file.
Note that most of these instrumental parameters,
such as wavelength or DIFC can be edited on this pane or
on the profile pane
(the simulated pattern is also affected by constants on the
scaling pane.)
The 2-theta/energy/TOF
range to be used for the computation, as well as the step size,
must be entered before pressing the "Add" button.
Note that once the histogram is added, this range and step size
cannot be edited within EXPGUI at present. However,
EXPEDT can be used to change these values.
If errors are detected in the input, an error message is displayed
detailing where the errors are found. Otherwise, the EXPTOOL program is run
and the output is optionally displayed
(See Show EXPTOOL output).
When these "Use" flags are changed, it is necessary to run POWPREF,
to propogate the changes. After the "Save" button is pressed, a prompt such
as the example below, is generated to run POWPREF. Note that GENLES may
fail if POWPREF is not run after changing these flags.
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