Calculate the number of nonzero rows

Hi,

How can I calculate the number of nonzero rows in a matrix?

I have

B =

3 4

5 0

0 0

and the number of nonzero rows (that I need) is 2. (because the 2nd row has the element of '5')

I tried sum( all( B ~= 0, 2 ) ); but the answer is 1.

[KALYAN ACHARJYA]

B =[3 4;5 0;0 0];
result=sum(~(all(B==0,2)))

Answer 1

[Stephen23]

>> nnz(any(B,2))
ans = 2

[Jos (10584)]

the way to go, but if you insist on using ALL, try

nnz(~all(B,2))

[muhammad muda]

yes it works! Thanks!

Answer 2

[the cyclist]

Use any instead of all. Your code is counting rows in which all entries are non-zero.

[muhammad muda]

Thanks, i'll use any then :)