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"Freezing" evaluation Output?

• To: mathgroup at smc.vnet.net
• Subject: [mg68858] "Freezing" evaluation Output?
• From: AES <siegman at stanford.edu>
• Date: Mon, 21 Aug 2006 03:28:26 -0400 (EDT)
• Organization: Stanford University
• Sender: owner-wri-mathgroup at wolfram.com

[I hope people will pardon the ongoing barrage of perhaps absurd 
questions I keep posting; the answers are appreciated, and sometimes 
even useful.]

Is there any simple programmable way to "freeze" the Output from the 
evaluation of an Input cell, so that subsequent reevaluation of the 
Input cell doesn't end by erasing the previous output?

E.g., I evaluate a plotting routine that takes a long time to do all its 
calculations, and I want to be sure I keep the resulting graphic around 
until I'm ready to delete it.

I appreciate there are simple ways to do this "manually":

1)  Insert (by hand) a dummy text cell between the Input and Output 
cells.

2)  Export the Output to somewhere else, with a file name that contains 
an execution-time-dependent string.

3)  Other similar approaches requiring "operator intervention".

But is there an execution (or output) option for Input cells (or for 
individual commands) that says, "Don't replace previous output, even if 
it's still there"?