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Re: SIGN function: signof(num or array of num) [message #70136 is a reply to message #70134]

Tue, 16 March 2010 08:46

Carsten Lechte
Messages: 124
Registered: August 2006

Senior Member

Ding wrote:
> IDL> a=[[1,0][-1,0]]
> IDL> print,signof(a)
> 1 0
> -1 0

Still, you should mention under RESTRICTIONS that the
input must be an integer type:

IDL> a=[[1,0],[-1,0]]
IDL> print, signof(a)
1 0
-1 0
% Program caused arithmetic error: Integer divide by 0
IDL> print, signof(double(a))
1 -32768
-1 -32768
% Program caused arithmetic error: Floating illegal operand
IDL> print, signof(complex(a))
1 -32768
-1 -32768
% Program caused arithmetic error: Floating illegal operand

chl

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[Message index]

		Re: SIGN function: signof(num or array of num) By: Foldy Lajos on Tue, 16 March 2010 09:41
		Re: SIGN function: signof(num or array of num) By: Carsten Lechte on Tue, 16 March 2010 09:36
		Re: SIGN function: signof(num or array of num) By: Carsten Lechte on Tue, 16 March 2010 09:25
		Re: SIGN function: signof(num or array of num) By: Ding on Tue, 16 March 2010 09:17
		Re: SIGN function: signof(num or array of num) By: Carsten Lechte on Tue, 16 March 2010 08:46
		Re: SIGN function: signof(num or array of num) By: Ding on Tue, 16 March 2010 08:43
		Re: SIGN function: signof(num or array of num) By: Carsten Lechte on Tue, 16 March 2010 08:35
		Re: SIGN function: signof(num or array of num) By: Ding on Tue, 16 March 2010 08:32
		Re: SIGN function: signof(num or array of num) By: H. Evans on Tue, 16 March 2010 07:30

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