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Re: Max value vector [message #15546 is a reply to message #15544]

Fri, 21 May 1999 00:00

Liam Gumley
Messages: 473
Registered: November 1994

Senior Member

Thomas C. Stubbings wrote:
> What I would need is something like the MATLAB command max(i) where i is an
> array(n,m) and max(i) returns a vector containing the maximum value of each
> column. The IDL max command only returns a scalar containing the absolute
> maximum of the array.

Try Craig Markwardt's CMAPPLY at
http://cow.physics.wisc.edu/~craigm/idl/idl.html#cmapply

> I even tried a big loop running through each column to find the max of each,
> but IDL doesnt accept loops with 64000 iterations

In fact IDL *does* accept loops with 64000 iterations; you just need to
make sure your loop variable is of LONG type, e.g.

for i = 0L, 64000L do begin
if (i mod 1000L) eq 0L then print, i
endfor

Cheers,
Liam.

--
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
http://cimss.ssec.wisc.edu/~gumley

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[Message index]

		Re: Max value vector By: Amara Graps on Wed, 26 May 1999 00:00
		Re: Max value vector By: Evan Fishbein on Sun, 23 May 1999 00:00
		Re: Max value vector By: Martin Schultz on Fri, 21 May 1999 00:00
		Re: Max value vector By: Liam Gumley on Fri, 21 May 1999 00:00
		Re: Max value vector By: Justin Ashmall on Fri, 21 May 1999 00:00
		Re: Max value vector By: Justin Ashmall on Fri, 21 May 1999 00:00

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