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Re: Can I do this without using loops? [message #6321 is a reply to message #6308]

Wed, 05 June 1996 00:00

rivers
Messages: 228
Registered: March 1991

Senior Member

In article <31B59C2D.C@dundee.ac.uk>, Peter Clinch <p.j.clinch@dundee.ac.uk> writes:
> Can't quite see how, but I have a feeling there's a Better Way...
>
> I have a couple of images, same size, and I need to compare the two and
> take a result which has the highest value from either of the inputs. Ay
> the mo. I'm just using loops through all the pixels using an if greater
> than comparison, and it takes ages... :(

That is an easy one, just use the > operator.

IDL> a = [[1,2,3],[1,2,3],[1,2,3]]
IDL> b = [[3,2,1],[3,2,1],[3,2,1]]
IDL> print, a
1 2 3
1 2 3
1 2 3
IDL> print, b
3 2 1
3 2 1
3 2 1
IDL> print, a>b
3 2 3
3 2 3
3 2 3

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[Message index]

		Re: Can I do this without using loops? By: bowman on Sat, 08 June 1996 00:00
		Re: Can I do this without using loops? By: santanu on Sat, 08 June 1996 00:00
		Re: Can I do this without using loops? By: Bruce E Thomason on Thu, 06 June 1996 00:00
		Re: Can I do this without using loops? By: rivers on Wed, 05 June 1996 00:00
		Re: Can I do this without using loops? By: peter on Wed, 05 June 1996 00:00

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