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Re: HELP: How to do count to the SUB-LIST


> 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!


In[1]:= (Count[#1, x_ /; x != 0] & ) /@ {{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}}

Out[1]= {0, 3, 3, 4, 10, 9}

Adriano Pascoletti



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