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Re: Little help on arrays [message #38033 is a reply to message #38032]

Mon, 16 February 2004 19:53

MKatz843
Messages: 98
Registered: March 2002

Member

mchinand@midway.uchicago.edu (Mike Chinander) wrote in message news:> If you don't want to compare element by element, you could check to see if the max and min of
> the difference of the two arrays are the same:
>
> IDL> if max(a-b) eq min(a-b) then print, 'bingo!'

This gives the wrong result if there's a constant difference between
the arrays. For example.
a = [3,4,5,3]
b = [2,3,4,2]

then
max(a-b) = max([1,1,1,1]) = 1
yet
min(a-b) = min([1,1,1,1]) = 1
So they're equal, but the arrays aren't.

M. Katz

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[Message index]

		Re: Little help on arrays By: mchinand on Mon, 16 February 2004 20:07
		Re: Little help on arrays By: MKatz843 on Mon, 16 February 2004 19:53
		Re: Little help on arrays By: Foldy Lajos on Mon, 16 February 2004 12:13
		Re: Little help on arrays By: JD Smith on Mon, 16 February 2004 11:23
		Re: Little help on arrays By: Craig Markwardt on Mon, 16 February 2004 07:27
		Re: Little help on arrays By: Pepijn Kenter on Mon, 16 February 2004 07:12
		Re: Little help on arrays By: mchinand on Mon, 16 February 2004 07:12

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