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Re: How to use max() to plot where in the plot max is located ? [message #31829 is a reply to message #31826]

Thu, 22 August 2002 09:36

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Kolbjorn Bekkelund (kobe@rocketrange.no) writes:

> The file read in below conatins 14 lines of header info read into the
> header variable. Below these I've got about 1000 lines of 7 coloum
> floats. The snip of my program below plots the selected info in ok curves
> and adds info with xyouts about the max and min value of those. BUT; I
> would like to add a sign or a vertical bar going through the point of
> maximum.
>
> How do I do that ?

Use the second positional parameter to your MAX and MIN
functions to get the indices where the maximum or
minimum occurs:

min308=min(data(3,*), maxindex)
max308=max(data(3,*), minindex)

Then, just draw some kind of symbol on your plot. Say,
a big asterisk:

PLOTS,((data(3,*))[maxindex]/shots/0.0974),$
(data(2,*))[maxindex], color=166, PSYM=2, $
SYMSIZE=2.5

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: How to use max() to plot where in the plot max is located ? By: David Fanning on Thu, 22 August 2002 18:51
		Re: How to use max() to plot where in the plot max is located ? By: Paul Van Delst[1] on Thu, 22 August 2002 15:07
		Re: How to use max() to plot where in the plot max is located ? By: David Fanning on Thu, 22 August 2002 13:57
		Re: How to use max() to plot where in the plot max is located ? By: Paul Van Delst[1] on Thu, 22 August 2002 13:09
		Re: How to use max() to plot where in the plot max is located ? By: Kolbjorn Bekkelund on Thu, 22 August 2002 12:13
		Re: How to use max() to plot where in the plot max is located ? By: David Fanning on Thu, 22 August 2002 09:36

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