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Re: rounding errors [message #24916 is a reply to message #24915]

Fri, 27 April 2001 07:51

Randall Skelton
Messages: 169
Registered: October 2000

Senior Member

On Fri, 27 Apr 2001, Liam E. Gumley wrote:

> This is a subtle but important point. DOUBLE() is a type conversion
> function, and
>
> a = double(2.348339)
>
> shows a FLOAT argument being converted to a DOUBLE. The safest way to
> 'cast' a double variable is
>
> a = 2.348339d
[snip]

Wow... I am glad that I have now learned that particular 'IDL feature'
early on in my PhD. Just yesterday, I convinced the department that we
really need a few good IDL programming books as the current
'learning-by-fire' approach could have some unfortunate consequences ;)

Oh well, back to searching my IDL code for incorrect double precision
constants...

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[Message index]

		Re: rounding errors By: thompson on Fri, 27 April 2001 11:34
		Re: rounding errors By: Liam E. Gumley on Fri, 27 April 2001 10:01
		Re: rounding errors By: Karl Schultz on Fri, 27 April 2001 09:07
		Re: rounding errors By: Paul van Delst on Fri, 27 April 2001 08:47
		Re: rounding errors By: Craig Markwardt on Fri, 27 April 2001 08:52
		Re: rounding errors By: John-David T. Smith on Fri, 27 April 2001 08:39
		Re: rounding errors By: thompson on Fri, 27 April 2001 08:23
		Re: rounding errors By: Dominic R. Scales on Fri, 27 April 2001 07:41
		Re: rounding errors By: Randall Skelton on Fri, 27 April 2001 07:51
		Re: rounding errors By: Liam E. Gumley on Fri, 27 April 2001 07:21
		Re: rounding errors By: Craig Markwardt on Fri, 27 April 2001 06:44
		Re: rounding errors By: Randall Skelton on Fri, 27 April 2001 06:17
		Re: rounding errors By: Dominic R. Scales on Fri, 27 April 2001 04:38
		Re: rounding errors By: Alex Schuster on Fri, 27 April 2001 03:52
		Re: rounding errors By: James Kuyper on Wed, 02 May 2001 08:06
		Re: rounding errors By: James Kuyper on Wed, 02 May 2001 08:07

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