On Tuesday, April 21, 2015 at 5:17:04 AM UTC-6, David B wrote:
> Suppose I create a variable:
>
> ----------------------------------------
> ;Create arrays
> a = [1,2,3,4,5,6]
> b =[7,8,9,10]
> c = INDGEN(10,10)
>
> ;Save these arrays normally
> save, a, b, c, filename = 'file.sav'
>
> ;Run a reset
> .reset
>
> ;Restore these variables, but into an object
> sobj= OBJ_NEW('IDL_Savefile', 'file.sav')
>
> ;Extract names
> names = sObj->Names()
>
> ;Print
> Print, names
>
> ----------------------------------------
>
> The problem is that I need the variables to be named something differently, but I cannot extract the variables into a new name. Non of my objects are heap variables, just standard variables.
>
> For example, following this:
>
> http://www.exelisvis.com/docs/idl_savefile__restore.html#obj ects_misc_904195448_1034949
>
> One can restore Pointers and Objects into a new object/pointer, so you can automatically rename your variables on the fly with the line:
>
> ----------------------------------------
> ; Restore the heap variable, associating it with a new regular
> ; variable. Note that ptrName is (in this case) a one-element array.
> sObj->Restore, ptrName[0], /POINTER_HEAPVAR, NEW_HEAPVAR=myNewPtr
> ----------------------------------------
>
> I have an almost solid reason for doing this in my case. What I am therefore saying is that I want for example (but I cannot do this, because 'new_variable' is not an option in the restore method!)
>
> FOR i = 0, n_elements(names)-1, 1 DO BEGIN
>
> sobj->Restore, names[i], new_variable = 'new_'+names[i]
>
> ENDFOR
>
> SO I end up with the following as a result:
>
> new_a = a
> new_b = b
> new_c = c
>
> Where I can restore a simple variable, like an array, into a new name. I may be missing the point here but I cannot think of a way to do this in a strait forward way, and the 'EXECUTE' command is out of the question for these objects.
>
> Clearly I am being stupid, but I really am stuck. Also, I know this method does not work as:
>
> new = obj->Restore, names[i], new_variable = 'new_'+names[i]
>
> otherwise, my problem would be solved easily. Can anyone offer insight into this and point out my mistake?
>
> Thanks much
>
> David
Why not wrap your Restore call in a procedure and use the names you want as parameter or keyword arguments?
pro myrestore, sObj, a = a, b = b, ...
sobj->restore, a, ...
end
pro mymain
sobj = idl_savefile(...)
myrestore, sobj, a = new_a, b = new_b, ...
help, new_a, new_b, ...
end
If you're going to generate the new names on the fly, you might want to consider using a hash instead.
Jim P.
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