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Re: Structure creation [message #80538 is a reply to message #3992]

Wed, 20 June 2012 03:21

Carsten Lechte
Messages: 124
Registered: August 2006

Senior Member

On 20/06/12 12:07, John Coxon wrote:
> Hi there,
>
> Having an odd issue with creating structures.
>
> idl > med = {avg1, dawnR1:0.0, duskR1:0.0, dawnR2:0.0, duskR2:0.0}
> idl > print,med.dawnR1
> 0
> idl > help,med.dawnR1
> <Expression> INT = 0

I would guess that you previously defined a structure with name avg1
that had dawnR1 as an integer. dawnR1's type is determined by the
initialisiation value from the very first use of the structure. A
naked "40" or "0" is interpreted by IDL as an integer constant.

Either change to using unnamed structures, or be extra careful when
specifying values, e.g. always do 1.0 when you want float, 1d0 when
you want double, 40L for long etc.

chl

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[Message index]

		Structure Creation with Execute By: msreeve on Tue, 11 April 1995 00:00
		Re: Structure Creation with Execute By: Greening C M on Wed, 19 April 1995 00:00
		Re: Structure Creation with Execute By: wmc on Tue, 18 April 1995 00:00
		Re: Structure creation By: Michael Galloy on Wed, 20 June 2012 09:11
		Re: Structure creation By: lecacheux.alain on Wed, 20 June 2012 07:06
		Re: Structure creation By: John Coxon on Wed, 20 June 2012 04:01
		Re: Structure creation By: Carsten Lechte on Wed, 20 June 2012 03:21

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