| Re: turn a string value into variable name [message #63028] |
Fri, 24 October 2008 06:08  |
greg.addr
Messages: 160
Registered: May 2007
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Senior Member |
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That works, but wouldn't it be better to bring them into an array?
Otherwise you'll meet the same problem when you want to calculate
something with them..
scenario=ptrarr(n)
for i=0,n-1 do begin
...
scenario[i]=ptr_new(mySavedStruct)
endfor
...
DoSomething,*(scenario[j])
good luck,
Greg
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| Re: turn a string value into variable name [message #63142 is a reply to message #63040] |
Wed, 29 October 2008 06:18  |
loebasboy
Messages: 26
Registered: August 2008
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Junior Member |
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On 23 okt, 23:56, David Fanning <n...@dfanning.com> wrote:
> Nick writes:
>> I am restoring over 100 .sav files and creating structures for
>> analysis. Each .sav represents a differenct scenario and ideally I
>> would like to name the created structure in sequential format (case1,
>> case2...casen).
>
>> To pull the data in I am using a for loop (all .sav have identical
>> array names) and I'd like to use the counter to name the variable. Is
>> it possible to turn a string into a variable name?
>
> The EXECUTE command can do this:
>
> FOR j=0,n DO BEGIN
> IF Execute('case' + String(j, Format='(I3.3)') + $
> '= mysavedStruct') EQ 0 THEN $
> Print, 'We have a failure to execute!'
> ENDFOR
>
> At one time there was a limit on the number of new
> variables that could be created this way inside an
> IDL program. I believe that limit has been removed.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Thank you David, I had the same question !
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| Re: turn a string value into variable name [message #82321 is a reply to message #63040] |
Thu, 06 December 2012 01:55 |
sher.astro
Messages: 2
Registered: August 2012
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Junior Member |
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在 2008年10月24日星期五UTC+8上午6时56分27秒，David Fanning写道：
> Nick writes:
>
>> I am restoring over 100 .sav files and creating structures for
>> analysis. Each .sav represents a differenct scenario and ideally I
>> would like to name the created structure in sequential format (case1,
>> case2...casen).
>>
>> To pull the data in I am using a for loop (all .sav have identical
>> array names) and I'd like to use the counter to name the variable. Is
>> it possible to turn a string into a variable name?
>
> The EXECUTE command can do this:
>
> FOR j=0,n DO BEGIN
> IF Execute('case' + String(j, Format='(I3.3)') + $
> '= mysavedStruct') EQ 0 THEN $
> Print, 'We have a failure to execute!'
> ENDFOR
it's helpful. thanks a lot
>
> At one time there was a limit on the number of new
> variables that could be created this way inside an
> IDL program. I believe that limit has been removed.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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