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Re: How to plot many lines simultaneously [message #32729]

Tue, 05 November 2002 21:47

Jeff Guerber
Messages: 41
Registered: July 2000

Member

On Tue, 5 Nov 2002, David Fanning wrote:

> lily_zhang (fengliza@sina.com) writes:
>
>> Now I have two matrices, X and Y. Supposing X = FltArr(100), Y =
>> FltArr(8,100),
>> I just wonder how to plot all the columns of Y as the functions of X
>> in an image simultaneouly.
>
> I'd try something like this.
>
> Plot, x, y[0,*], YRange=[Min(y),Max(y)]
> FOR j=1,7 DO OPlot, x, y[j,*]

Lily, since no one else has mentioned this I'd just like to add that,
although it doesn't make a noticeable difference in this small example, if
you're doing this A LOT or the arrays are much bigger, it's much more
efficient if Y = FltArr(100,8) (and you make the corresponding changes to
David's programlet). Remember that in IDL, as in Fortran, the left index
varies the fastest.

Jeff Guerber

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[Message index]

		Re: How to plot many lines simultaneously By: Jeff Guerber on Tue, 05 November 2002 21:47
		Re: How to plot many lines simultaneously By: David Fanning on Tue, 05 November 2002 13:45
		Re: How to plot many lines simultaneously By: Pavel A. Romashkin on Tue, 05 November 2002 13:00
		Re: How to plot many lines simultaneously By: R.G. Stockwell on Tue, 05 November 2002 06:34
		Re: How to plot many lines simultaneously By: David Fanning on Tue, 05 November 2002 05:20

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