Setting and Unsetting values, memory usage problems.
- To: mathgroup at smc.vnet.net
- Subject: [mg79606] Setting and Unsetting values, memory usage problems.
- From: Lyle Gordon <lgordon at gmail.com>
- Date: Tue, 31 Jul 2007 06:05:27 -0400 (EDT)
I have a function defined like this f[a_, b_] := f[a,b] = the function f (returns an interpolating function) f2[a_, b_, c_] := f[a,b] /.t -> c I use this to store each solution of the function f[a,b] so that I can then evaluate it at each time point (f2[a,b,c]) for the specific a & b without re-evaluating the entire thing (f[a,b]) for each time point. The problem is that each interpolating function is very large in memory and the function gets called for many different pairs of a & b and eventually I run out of memory before the code completes (I have 4gigs). The thing is I don't need to store more than the few most recent values of f[a,b], however not storing any makes the code too slow to be usable as f has to be evaluated for everytime point (8000 points). I was wondering if there is a way to code the function to only store the last 4-5 values of f[a,b] or even just the most recent one. Hopefully this makes sense and someone can help. Thanks, Lyle Gordon