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Re: Comparing 2 arrays [message #55557 is a reply to message #55556]

Sun, 26 August 2007 08:40

Jean H.
Messages: 472
Registered: July 2006

Senior Member

> If your arrays are the same size, there is no problem using structures.
> You could subtract the two values and call the result "equal" if
> the difference was "sufficiently" close to zero.
>
> IF Total( (data1.A - data2.B) LT 1e-6) EQ N_Elements(data1.A) THEN $
> Print, 'The arrays are equal' ELSE Print, 'The arrays are unequal'
>
> Cheers,
>
> David

David,

to get back to a previous discussion we had a few month ago about being
"sufficiently close to zero", shouldn't it be (data1.A - data2.B) LT
epsilon * data1.A , with epsilon=(machar()).eps?

Jean

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[Message index]

		Re: Comparing 2 arrays By: David Fanning on Mon, 27 August 2007 08:06
		Re: Comparing 2 arrays By: Conor on Mon, 27 August 2007 06:48
		Re: Comparing 2 arrays By: David Fanning on Sun, 26 August 2007 09:43
		Re: Comparing 2 arrays By: Jean H. on Sun, 26 August 2007 08:40
		Re: Comparing 2 arrays By: David Fanning on Sun, 26 August 2007 07:32
		Re: Comparing 2 arrays By: airy.jiang on Sun, 26 August 2007 02:39
		Re: Comparing 2 arrays By: teich on Sat, 25 August 2007 22:25
		Re: Comparing 2 arrays By: David Fanning on Sat, 25 August 2007 21:47
		Re: Comparing 2 arrays By: David Fanning on Sat, 25 August 2007 21:45
		Re: Comparing 2 arrays By: David Fanning on Tue, 28 August 2007 08:15
		Re: Comparing 2 arrays By: James Kuyper on Mon, 27 August 2007 10:40
		Re: Comparing 2 arrays By: Paul Van Delst[1] on Mon, 27 August 2007 10:52

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