| Re: IDL Save Object Resoration [message #90822 is a reply to message #90821] |
Tue, 21 April 2015 05:55   |
Michael Galloy
Messages: 1114
Registered: April 2006
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Senior Member |
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On 4/21/15 5:17 AM, 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
>
I have a routine MG_SAVE_GETDATA that can do this:
https://github.com/mgalloy/mglib/blob/master/src/save/mg_sav e_getdata.pro
Just call it like:
cow_filename = file_which('cow10.sav')
my_name_for_polylist = mg_save_getdata(cow_filename, 'polylist')
Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)
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