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Re: subtle but important [message #24911 is a reply to message #24908]

Fri, 27 April 2001 08:28

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Randall Skelton <rhskelto@atm.ox.ac.uk> writes:
> On Fri, 27 Apr 2001, Liam E. Gumley wrote:
>
>> This is a subtle but important point. DOUBLE() is a type conversion
>> function [snip]
>
> While we are on the subject of 'subtle but important points' in IDL...
>
> I also learned today that for integers the default length is 16-bit unless
> you use the "COMPILE_OPT DEFINT32" statement. Try "print, 1000*1000" in
> IDL.

That's why I often use "print, 1000L*1000L". Appending "L" to
integers saves a lot of grief later on. The COMPILE_OPT approach
works in newer versions, but not in IDL 5.2 or older.

Craig

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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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		Re: subtle but important By: Paul van Delst on Fri, 27 April 2001 09:12
		Re: subtle but important By: Craig Markwardt on Fri, 27 April 2001 08:28

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