Re: Counting nonzeros
- To: mathgroup at smc.vnet.net
- Subject: [mg86903] Re: Counting nonzeros
- From: rfsdias at hotmail.com
- Date: Wed, 26 Mar 2008 04:48:02 -0500 (EST)
- References: <fs7iml$gma$1@smc.vnet.net> <fsa5gf$ae8$1@smc.vnet.net>
On 25 mar, 03:18, Peter Pein <pet... at dordos.net> wrote: > car... at colorado.edu schrieb: > > > I want to count the # of NZ entries in an arbitrary multilevel list, > > say exp, that contains only integers. Is this the easiest way: > > > k = Length[Flatten[exp]]-Count[Flatten[exp],0] > > Count[Flatten[exp],Except[0]] is a bit shorter > > Peter try also: Count[exp,Except[0],-1] regards Robson