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Re: Reading large files with restore [message #85948 is a reply to message #85942]

Fri, 20 September 2013 09:46

Phillip Bitzer
Messages: 223
Registered: June 2006

Senior Member

Let me see if I understand:

1) You have a save file with a *lot* of data.
2) You'd like to restore and work with some of the data.
3) It takes a long time to restore everything in the file and extract just what you want.

If this is correct, then the IDLSave_File object is what you're after.

Consider a save file created with :
SAVE, var1, var2, file='idl.sav'

Then you can get *just* var1 with
sObj = OBJ_NEW('IDL_Savefile', 'idl.sav')
sObj->RESTORE, 'var1'
OBJ_DESTROY, sObj ;when you're done with the file

There are ways to get the variable names if you don't know them a priori. Check out:
http://www.exelisvis.com/docs/IDL_Savefile.html

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[Message index]

		Reading large files with restore By: Sir Loin Steak on Fri, 20 September 2013 08:18
		Re: Reading large files with restore By: David Fanning on Fri, 20 September 2013 08:25
		Re: Reading large files with restore By: Sir Loin Steak on Fri, 20 September 2013 08:30
		Re: Reading large files with restore By: David Fanning on Fri, 20 September 2013 08:33
		Re: Reading large files with restore By: Sir Loin Steak on Fri, 20 September 2013 08:50
		Re: Reading large files with restore By: David Fanning on Fri, 20 September 2013 09:00
		Re: Reading large files with restore By: Phillip Bitzer on Fri, 20 September 2013 09:46
		Re: Reading large files with restore By: Sir Loin Steak on Mon, 23 September 2013 05:48
		Re: Reading large files with restore By: Paul Van Delst[1] on Tue, 24 September 2013 10:56

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