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Re: plot function and legend in a for loop [message #91860 is a reply to message #91851]

Fri, 04 September 2015 12:24

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

On Friday, September 4, 2015 at 8:25:37 AM UTC-4, andrea...@gmx.de wrote:
> Dear all,
>
> I'm trying to create an indefinite number of lines in one plot. Additionally the goal is to additionally get a legend.
>
> I was trying to do this somehow like this:
>
> p=plot(spec(0), name=names(0))
>
> for i=1,n_elements(spec-1) do p1=plot(spec(i), name=names(i), /over)
>
>
> l=legend(target=[p,p1])
>
> doing that, not unsurprisingly, I get only the first and last name in the legend.
>
> Is there a way to mitigate the issue other than adding if statements like
>
> if n_elements(spec) gt 2 then p3=plot ....
> if n_elements(spec) gt 3 then p4=plot ....
>
> with this way, no matter how many of these lines I add I would at some day end up with some plots not being plotted ;-)
>
> thanks a lot and best regards
> Andreas

I would try something like this:

p=objarr(n)
for i = 0, n-2 do begin
p[i] = plot(...., name=names[i],..., overplot=i)
endfor
l = legend(target=p)

cheers,

paulv

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[Message index]

		plot function and legend in a for loop By: andreas.brunn on Fri, 04 September 2015 05:25
		Re: plot function and legend in a for loop By: Alain Kattnig on Fri, 04 September 2015 05:39
		Re: plot function and legend in a for loop By: andreas.brunn on Fri, 04 September 2015 05:45
		Re: plot function and legend in a for loop By: andreas.brunn on Fri, 04 September 2015 05:40
		Re: plot function and legend in a for loop By: Paul Van Delst[1] on Fri, 04 September 2015 12:24
		Re: plot function and legend in a for loop By: Paul Van Delst[1] on Fri, 04 September 2015 12:26

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