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Re: How to test for a vector/matrix of constants? [message #51768 is a reply to message #51767]

Wed, 06 December 2006 11:38

Braedley
Messages: 57
Registered: September 2006

Member

Mirko wrote:
> How can I quickly check if a vector/matrix is full of constants (all
> elements equal)?
> For example if a vector contained:
> [2.38,2.38,2.38,...,2.38]
> I want it flagged as a "constant" vector.
>
> I can think of finding differences between successive elements, and
> check for non-zero elements.
>
> Any faster options?
>
> Thanks,
>
> Mirko

Probably not as fast as the others, but

if n_elements(uniq(array, sort(array))) eq 1 then ;flag it

Braedley

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[Message index]

		Re: How to test for a vector/matrix of constants? By: JD Smith on Wed, 06 December 2006 16:00
		Re: How to test for a vector/matrix of constants? By: JD Smith on Wed, 06 December 2006 15:54
		Re: How to test for a vector/matrix of constants? By: JD Smith on Wed, 06 December 2006 15:53
		Re: How to test for a vector/matrix of constants? By: Karl Schultz on Wed, 06 December 2006 15:23
		Re: How to test for a vector/matrix of constants? By: JD Smith on Wed, 06 December 2006 14:10
		Re: How to test for a vector/matrix of constants? By: Foldy Lajos on Wed, 06 December 2006 13:31
		Re: How to test for a vector/matrix of constants? By: Paul Van Delst[1] on Wed, 06 December 2006 13:26
		Re: How to test for a vector/matrix of constants? By: Foldy Lajos on Wed, 06 December 2006 13:05
		Re: How to test for a vector/matrix of constants? By: Bob Crawford on Wed, 06 December 2006 13:04
		Re: How to test for a vector/matrix of constants? By: Karl Schultz on Wed, 06 December 2006 12:58
		Re: How to test for a vector/matrix of constants? By: Paul Van Delst[1] on Wed, 06 December 2006 12:54
		Re: How to test for a vector/matrix of constants? By: Foldy Lajos on Wed, 06 December 2006 11:59
		Re: How to test for a vector/matrix of constants? By: Braedley on Wed, 06 December 2006 11:38
		Re: How to test for a vector/matrix of constants? By: Mirko on Wed, 06 December 2006 11:13
		Re: How to test for a vector/matrix of constants? By: Bob[3] on Wed, 06 December 2006 10:43
		Re: How to test for a vector/matrix of constants? By: Allan Whiteford on Wed, 06 December 2006 10:40
		Re: How to test for a vector/matrix of constants? By: Paul Van Delst[1] on Fri, 08 December 2006 05:48

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