| Re: Plotting Graphs on Same Plot With Axes Rescaled To Include Largest Range [message #75990] |
Mon, 09 May 2011 12:34 |
penteado
Messages: 866
Registered: February 2018
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Senior Member
Administrator |
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On May 9, 4:18 pm, Chris Williams <fam36boozl...@gmail.com> wrote:
> Is it possible to plot a set of 2D graphs on the same graph, with the
> x,y-axes being rescaled to include the entire graph for each overplot?
>
> The problem I am having is if I have two graphs, and the second graph
> has a larger range than the first graph, both graphs will be on the
> axes of the first graph instead of the second graph. This clips the
> first graph which I do not want.
>
> Using the /NOERASE keyword keeps ALL of the axes on a set of plot,
> instead of the one with the largest range of values.
>
> Ideally, I am looking for a keyword to automatically set the graph
> axes to the data set with the largest range of values. For example,
> when using gnuplot, if you "plot func1, func2, func3", gnuplot will
> draw all three graphs and put them on the scale of the one with the
> largest values, so that all of the functions can be seen.
With the iTools or (new) Graphics, that is the default behavior. With
direct graphics, it is impossible: once something is drawn to the
device, it stays there, and no information is preserved on how it was
made. You may think of direct graphics as a printer. Once something
goes there, you cannot take it back (though you can erase what is
there).
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| Re: Plotting Graphs on Same Plot With Axes Rescaled To Include Largest Range [message #75991 is a reply to message #75990] |
Mon, 09 May 2011 12:32  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Chris Williams writes:
> Is it possible to plot a set of 2D graphs on the same graph, with the
> x,y-axes being rescaled to include the entire graph for each overplot?
>
> The problem I am having is if I have two graphs, and the second graph
> has a larger range than the first graph, both graphs will be on the
> axes of the first graph instead of the second graph. This clips the
> first graph which I do not want.
>
> Using the /NOERASE keyword keeps ALL of the axes on a set of plot,
> instead of the one with the largest range of values.
>
> Ideally, I am looking for a keyword to automatically set the graph
> axes to the data set with the largest range of values. For example,
> when using gnuplot, if you "plot func1, func2, func3", gnuplot will
> draw all three graphs and put them on the scale of the one with the
> largest values, so that all of the functions can be seen.
minPlot = Min([data1,data2], Max=maxPlot)
cgPlot, data1, YRANGE=[minPlot, maxPlot]
cgPlot, data2, /Overplot
Similarly for the X values, if needed.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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