indices of all non zeros rows

Hi,

I have a large text file and I am trying to find the indices of the rows that do not have all zeros. For example is I have this matrix:

A=   5     3     1
     0     0     0
     5     7     9
     0     0     0
     4     0     0
     0     0     0
     2     0     0
     1     0     1
     1     0     0

To find the indices of rows with all zeros is by: find(all(A==0,2)) Which gives me this answer:2,4,6 Now, if someone can tell me how can I find the indices of the other rows which have values? e.g. for rows 1,3,5,7,8 and 9? Can someone please help me with a small code?

Best wishes

AA

[Edited to format array. -- the cyclist]

[Honglei Chen]

Your example shows a single vector, not a matrix. Could you format it correctly?

Answer 1

[the cyclist]

find(~all(A==0,2))

[Oleg Komarov]

find(any(A,2))

[Azza Ahmed]

Many thanks the cyclist and Oleg for your marvellous answers...they both work perfectly well....

I was wondering if there is a way to call back the lines (value in each column) of these indices without calling each one idividual. What I mean is something other than this method :

find(~all(A==0,2)

A(1,:),

As you can see I will need to repeat this to rows, 3,5,7,8,9 and since this a large text file it would unlikely be possible to do that for the whole lot. Is there a simpler way to do that?

Best wishes

AA

[Oleg Komarov]

idx = any(A,2)

A(idx,:)

[Azza Ahmed]

That's exactly what I am looking for. Many thanks Oleg!

AA