Re: how to use do loop for variable name changes

Hi Mary,

Thank you very much for pointing a way.

Guangshan

On Sep 14, 2010, at 11:35 AM, Mary Haley wrote:

> Hi Guangshan,
>
> There's no way to do this the way you are indicating below, but you can do this a kludgy way using attributes.
>
> If you treat the three variables as attributes of another variable, then you can use the special "$" syntax.
>
> For example, let's say you have a variable called "ccsm_var". It doesn't really matter what type it is. You can make it logical.
> Further assume this variable has three attributes attached to it, each an array of 10 elements:
>
> ccsm_var@ccsm_var_EAS = (/...array of 10 elements.../)
> ccsm_var@ccsm_var_SAS = (/...array of 10 elements.../)
> ccsm_var@ccsm_var_NAU = (/...array of 10 elements.../)
>
> You can now do this:
>
> reg_nm = (/"EAS","SAS","NAU"/)
> do i=0,2
> var_str = "ccsm_var_" + reg_nm(i)
> ccsm_var_3reg(i,:) = ccsm_var@$var_str$
> end do
>
> We have it our list to be able to use the "$..$" type of syntax directly. Right now, you can only use this syntax when referencing metadata of another variable.
>
> --Mary
>
> On Sep 13, 2010, at 1:18 PM, Guangshan Chen wrote:
>
>> Dear there,
>>
>> Let's say that I have the following variables for three regions:
>> ccsm_var_EAS(10),
>> ccsm_var_SAS(10),
>> ccsm_var_NAU(10)
>>
>> Now I want to create a new array to hold these three varaibles:
>> ccsm_var_3reg = new((/3,10/),float)
>>
>> if I create a string array to hold the region name:
>> reg_nm = (/"EAS","SAS","NAU"/)
>>
>> How could I use do loop to put the three variables to ccsm_var_3reg?
>>
>> some thing like this:
>>
>> do i=0,2
>> ccsm_var_3reg(i,:) = ccsm_var_"reg_nm(i)"
>> end do
>>
>> Guangshan
>>
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Received on Tue Sep 14 10:06:32 2010