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Re: Speedy way to get compare array elements. . . [message #33031 is a reply to message #32835]

Thu, 28 November 2002 06:58

the_cacc
Messages: 104
Registered: October 2001

Senior Member

Craig Markwardt <craigmnet@cow.physics.wisc.edu> wrote in message news:<on4raklqpk.fsf@cow.physics.wisc.edu>...
> ...The cool thing about the trick is that IDL *automatically* truncates
> the vector A so that it matches the length of A[1:*].
>

Ah, but is there any way to not make it do that? Say you have 2
vectors of different lengths:

x = findgen(50)
y = findgen(100)

and you want to form z = x * y, but have z the same length as y
putting zeros where x has no value. The (sorry) way I am doing it is

z = y * 0
z[0:49] = x * y

which clearly is too much programmer work since I have to get the
lengths... Any ideas?

Ciao.

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[Message index]

		Re: Speedy way to get compare array elements. . . By: Pavel A. Romashkin on Thu, 14 November 2002 08:51
		Re: Speedy way to get compare array elements. . . By: Craig Markwardt on Wed, 13 November 2002 20:28
		Re: Speedy way to get compare array elements. . . By: the_cacc on Thu, 28 November 2002 06:58
		Re: Speedy way to get compare array elements. . . By: marc schellens[1] on Tue, 03 December 2002 22:54

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