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Re: strange "eq" behaviour [message #69866 is a reply to message #69770]

Mon, 15 February 2010 08:18

Spon
Messages: 178
Registered: September 2007

Senior Member

On Feb 15, 3:54 pm, chris <rog...@googlemail.com> wrote:
> Hi David,
> maxx is the correlation coefficient of some data series. It should be
> exactly 1 if two data vectors are equal - but it isn't - so now I run
> into bigger problems with the inbuilt correlate function . Anyway,
> thanks for your hint.
>
> CR

Hi David,

'It should be exactly one' is a tricky statement in floating point
arithmetic.
Looks like a good time to trot out this old line again:
http://www.dfanning.com/math_tips/sky_is_falling.html

Your specific problem (or something very similar) is dealt with this
article:
http://www.dfanning.com/code_tips/comparearray.html

You might have more success comparing floats using this program:
http://www.dfanning.com/programs/floats_equal.pro

Regards,
Chris

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[Message index]

		strange "eq" behaviour By: rogass on Mon, 15 February 2010 07:27
		Re: strange "eq" behaviour By: rogass on Mon, 15 February 2010 09:21
		Re: strange "eq" behaviour By: Spon on Mon, 15 February 2010 08:18

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