Re: Count inside a matrix?
- To: mathgroup at smc.vnet.net
- Subject: [mg128034] Re: Count inside a matrix?
- From: David Reiss <dbreiss at gmail.com>
- Date: Mon, 10 Sep 2012 04:04:40 -0400 (EDT)
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Use the 3rd argument of Count to specify the level down which to go in
the pattern matching. E.g.:
In[1]:= mat = {
{1, a, b, \[Pi]},
{E, 2, 3, 1/3}
}
Out[1]= {{1, a, b, \[Pi]}, {E, 2, 3, 1/3}}
In[2]:= Count[mat, _Integer, 2]
Out[2]= 3
On Sep 8, 3:11 am, Sergio Sergio <zerg... at gmail.com> wrote:
> Hi, does anybody know how to count elements within a matrix?
> I know how that Count works for lists, but it does not seem to work for a matrix.
> Any tips?
>
> Thanks