Re: Finding length in recursive definition?
- To: mathgroup at smc.vnet.net
- Subject: [mg60894] Re: Finding length in recursive definition?
- From: Peter Pein <petsie at dordos.net>
- Date: Sun, 2 Oct 2005 01:54:45 -0400 (EDT)
- References: <email@example.com>
- Sender: owner-wri-mathgroup at wolfram.com
Jose Reckoner wrote: > I have something like: > f = 1 > f = 3 > f[n_] := f[n] = f[n - 1] + f[n - 2] > > and in the course of work, f[n] gets evaluated an unknown number of > times resulting in > > >>>?f > > f = 1 > f = 3 > f = 4 > f[n_] := f[n] = f[n - 1] + f[n - 2] > > I want to figure out the greatest integer n such that f[n] has already > been computed and is stored. In this case, it is 3. > > How can I do this? > > Thanks! > > Jose > Max[Cases[DownValues[f][[All,1,1,1]],_Integer]] 3 Peter