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NAME plot - make plots of the last
scan
SYNOPSIS plot
[data_group] [x_element]
[y_element]
DESCRIPTION The plot macro is called
at the end of each scan in order to plot the data. You should
use the setplot macro to select whether a screen
plot, a simple printer plot or both are produced by
plot.
DEFINITION If both end-of-scan screen plots and lp
plots are selected, plot is defined something like:
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def plot '
if (BG) {do_bg} # calculate linear background
splot \$* # draw screen plot
onp; offt # turn on printer, off tty
lp_plot \$* # draw lp plot
plot_res \$* # print scan results
ont; offp # turn on tty, off printer
'
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If neither or just one type of plot is selected, the
plot macro is redefined accordingly. If no plots
are selected, the scan results are still printed on the screen
and printer.
GLOBALS
BG - global variable holding a flag that if
set, indicates to use the background-subtracted data in the
analysis results and plots produced by the
plot
macro. It is important to make sure the do_bg macro
is called to calculate the background-subtracted data before
using macros such as pl_FWHM that look at the value
of BG to determine which data group to analyze. The
various standard definitions for the plot macro will
call do_bg when appropriate.
MACROS
do_bg - calculates a linear background
based on the scan endpoints, subtracts the background from the
scan (in data group 0) and places the results in data group 1.
plot_res - prints results of simple scan
analysis including peak value, full-width at half max, integrated
intensity, etc.
SEE ALSO
data
setplot
splot
lp_plot
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Last Formatted Jul 14, 2008
Last Updated 02/28/01
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