Placing parameters in memory

*To*: mathgroup at smc.vnet.net*Subject*: [mg33832] Placing parameters in memory*From*: <bradamanteus at yahoo.com>*Date*: Fri, 19 Apr 2002 02:28:13 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

My problem is likely to have a simple answer: I have a lot of fixed parameters in a program that are recall numerous times. The run command is something like this: run["test.m", 10, t -> 10, u -> 4, v -> 0.4, w -> 0.05] where I can set values for t, u, v, w which are the parameter options. To reduce the time of the run I wanted to place the parameters in memory. I added a line f[x_]:=f[x]=x and wrapped all the parameters in my code in f[]: e.g. f[t] instead of t But now when I run the simulation, it actually takes 20% longer to run rather than being quicker! My function f has memorized values like these: ?f f[10]=10 f[4]=4 f[0.4]=0.4 f[0.05]=0.05 But have I actually made any short cuts in this process? It seems like when the program calls on f[t],f[u],f[v] or f[w] it is not yet in memory and still has to be calculated...? What is the best way to set parameter options into the memory of mathematica? thanks Leanne. Newbie