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Re: For..Do loop. IDL Beginner [message #93793 is a reply to message #93792]

Tue, 18 October 2016 02:39

Nikola
Messages: 53
Registered: November 2009

Member

On Tuesday, October 18, 2016 at 12:46:43 AM UTC+1, Cheryl wrote:
> Hi,
>
> I am trying to plot the following using For.. Do loop.
>
> i. x, y2 ; psym = -4
> ii. x, y3 ; psym = -5
> iii. x, y4; psym = -6
>
> Can anyone help? Thanks

From your question is not very clear what you want to do and why. I guess your problem is that y's are different functions with different number of elements so that you have to deal with different variable names in a loop.

Here is a quick solution that may help you to move forward. (Note that the EXECUTE command should be used with extra caution - read IDL help on it!.)

syms = [-4, -5, -6]
for i = 0, N_ELEMENTS(syms)-1 DO BEGIN
IF i eq 0 THEN cmd = 'plot' ELSE cmd = 'oplot'
log = EXECUTE(cmd + ', x, y'+strcompress(string(i), /rem)+', psym = syms[i]')
ENDFOR

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[Message index]

		For..Do loop. IDL Beginner By: smnadoum on Mon, 17 October 2016 16:46
		Re: For..Do loop. IDL Beginner By: Nikola on Tue, 18 October 2016 02:39
		Re: For..Do loop. IDL Beginner By: Markus Schmassmann on Tue, 18 October 2016 03:50
		Re: For..Do loop. IDL Beginner By: Haje Korth on Tue, 18 October 2016 04:27
		Re: For..Do loop. IDL Beginner By: smnadoum on Thu, 27 October 2016 14:27
		Re: For..Do loop. IDL Beginner By: Bill Davis on Wed, 07 December 2016 12:23

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