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Re: Structure creation [message #80537 is a reply to message #3992]

Wed, 20 June 2012 04:01

John Coxon
Messages: 15
Registered: February 2012

Junior Member

On 20/06/2012 11:21, Carsten Lechte wrote:
> 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.

I see, that would make sense. Is there any way to clear a structure, for
instance, between two runs of a program?

--
John Coxon
http://www.chickensinenvelopes.net/

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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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