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Re: odd behaviour from array_equal() with NaN, Inf values [message #79037 is a reply to message #79030]

Mon, 23 January 2012 04:37

Carsten Lechte
Messages: 124
Registered: August 2006

Senior Member

On 23/01/12 06:46, Craig Markwardt wrote:
> It is a property of NAN that it can never equal itself so - perhaps
> surprisingly -
> (A[1] EQ A[1]) is false. Try it yourself!

I think this is a case where adherence to the IEEE standard is not
necessarily what the user wants. There should be a version of
ARRAY_EQUAL where NaN==NaN, for cases where one wants to know if two
arrays contain the same data; similar to MEAN(), which gives the
opportunity to ignore NaNs, and, with it, to shoot oneself in the foot.

chl

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[Message index]

		Re: odd behaviour from array_equal() with NaN, Inf values By: wallabadah on Mon, 23 January 2012 15:27
		Re: odd behaviour from array_equal() with NaN, Inf values By: Carsten Lechte on Mon, 23 January 2012 04:37
		Re: odd behaviour from array_equal() with NaN, Inf values By: Craig Markwardt on Sun, 22 January 2012 21:46

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