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Re: Trying to create a plot with strings as x-values... [message #88315 is a reply to message #88314]

Sun, 13 April 2014 21:13

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

doowstados@gmail.com writes:

> Please forgive my poor IDL background. Hopefully you IDL experts can help me out.
>
> I'm attempting to create a plot with strings as x values.
>
> I have two lists being loaded from text files in this format:
>
> xlist = list(value1, value1, value1, value2, value2, value3, ..., valueN)
>
> ylist = list(12, 17, 15, 13, 11.4, 19, 17, ..., numN)
>
> These lists are fairly short, maybe 150-200 coordinate pairs total, but only around 50 unique strings in the xlist, so the program doesn't need to be particularly resource efficient.
>
>
> IDL's plot function and cgPlot don't seem to get along well with strings.

I presume these "strings" are numbers. Something like '5.2' or '3.4'. If
so, just cast them to floats before you plot them.

IDL> value = '5.3'
IDL> Help, float(value)
<Expression> FLOAT = 5.30000

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Trying to create a plot with strings as x-values... By: doowstados on Sun, 13 April 2014 19:32
		Re: Trying to create a plot with strings as x-values... By: David Fanning on Sun, 13 April 2014 21:13
		Re: Trying to create a plot with strings as x-values... By: doowstados on Sun, 13 April 2014 22:18
		Re: Trying to create a plot with strings as x-values... By: Matthew Argall on Mon, 14 April 2014 05:23
		Re: Trying to create a plot with strings as x-values... By: David Fanning on Mon, 14 April 2014 05:33
		Re: Trying to create a plot with strings as x-values... By: doowstados on Mon, 14 April 2014 14:52

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