Re: HELP: How to do count to the SUB-LIST
- To: mathgroup at smc.vnet.net
- Subject: [mg82133] Re: [mg82096] HELP: How to do count to the SUB-LIST
- From: János <janos.lobb at yale.edu>
- Date: Sat, 13 Oct 2007 03:45:44 -0400 (EDT)
- References: <200710120651.CAA04299@smc.vnet.net>
On Oct 12, 2007, at 2:51 AM, zhen wrote:
> Hallo, everyone
>
> I am new to Mathematica, and I get one problem now, hope to get some
> help here
>
> I got a list like this:
>
> {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 1, 1, 0, 0, 0, 1, 0, 0, 0},
> {0, 0, 0, 0, 1, 1, 0, 0, 2, 0}, {1, 0, 1, 0, 0, 1, 0, 1, 0, 0},
> {1, 3, 3, 4, 2, 2, 5, 3, 2, 1}, {7, 2, 2, 3, 4, 4, 0, 3, 1, 3}}
>
> I need to get a list to show the number of non zero number in each sub
> list, as to say, I need to get a list like this:
>
> {0,3,3,4,10,9}
>
> Thanks alot!
>
As a newbie, I would go with the following pattern testing /See
Condition in the Help/:
In[3]:=
(Count[#1, x_ /;
x > 0] & ) /@ lst
Out[3]=
{0, 3, 3, 4, 10, 9}
Where lst is your list. Of course if you have negative values you
have to adjust the test.
J=E1nos
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- References:
- HELP: How to do count to the SUB-LIST
- From: zhen <wangzhen0829@gmail.com>
- HELP: How to do count to the SUB-LIST