Re: Recovering f[z] values?
- To: mathgroup at smc.vnet.net
- Subject: [mg42723] Re: Recovering f[z] values?
- From: AES/newspost <siegman at stanford.edu>
- Date: Wed, 23 Jul 2003 00:25:14 -0400 (EDT)
- References: <bfgb8a$8g4$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
My original post on this was not phrased with sufficient care: I really
had in mind not that f[z] was a defined function in the sense of
f[z_] := some function of z
but rather more like an array which, during the course of a calculation,
had values assigned to some of its (not necessarily integer) elements by
statements like
f[somevalue] = someothervalue
and I wanted to recover all the somevalue-someothervalue pairs at the
end of the calculation.
The solution I first received from jmt and then from several others,
namely
{#[[1,1,1]],#[[1,1]]}&/@DownValues[f]
does the job exactly [even if, to my eye, a syntax like this is
excruciatingly ugly]. Learning about DownValues was the key.
Thanks for responses.