@b@cGraphing in General

All graphing (histograms and plots) performed in xldlas is actually handled
by gnuplot. This is useful because it means you can save graphs in any
format supported by whatever version of gnuplot you are running. The default
save format is postscript and the default options are eps 'helvetica' 20 

This means, however, that for any graph commands to work, you must have
gnuplot installed on your system, and the installed version must at least
support the x11 terminal type. Gnuplot is available from sunsite and several
hundred other locations around the world.



@b@cHistogram


@bDescription

The histogram option graphs the distribution of a single variable into a
given number of bars. The number can be set using the Bars: counter. If the
Normal checkbox is on, then a normal distribution with the same mean and
variance as the plotted distribution will be superimposed over the plot. 

If a file name exists in the Save As: input area, then the Go command will
save the plot to the named file using the current Format: and Options:
settings. 

If you have invoked the graphing window with the plot option, then you can
switch to drawing histograms by clicking on the Histrogram button from
within the Graph window.


@bNotes

See Log --> TeXLog for important information about how to automatically
include histogram graphs in texlog files.


@bSee Also

Log --> TeXLog, Graph --> Plot



@b@cPlot


@bDescription

The plot command will graph any number of y variables versus a single x
variable. Most plot options are self-explanatory, but one relatively well
hidden feature is the ability to change the point and line styles of a given
variable by double clicking on the variables name in the variable list. 


@bNotes

See Log --> TeXLog for important information about how to automatically
include histogram graphs in texlog files.

You can generate a scatter plot (ie. no lines connecting the points) by
double clicking on a highlighted Y Variable and setting its line style
to 0.

@bSee Also

Log --> TeXLog, Graph --> Histogram

