For loop with a 10000x6

I have a 10000x6 matrix and i need to starters make a for loop which goes through the first column (it has values 1 and 0 in it) and deletes the rows with '0'. I've been battling with this as I just can't get it to work. If you could help with the whole loop.

[Matt J]

When you say a "table", do you mean an actual table data type, or do you just mean a 10000x6 matrix, A?

Answer 1

[Andrei Bobrov]

Let T - your table:

T_out = T(T{:,1} ~= 0,:);

[Stephen23]

+1 It is usually more efficient to keep the wanted data.

[Matt J]

It is usually more efficient to keep the wanted data.

Is it?

[Stephen23]

@Matt J: It was something that I remember from doing some tests a few years ago, so quite likely depends on the number of elements and probably the MATLAB version. Some test results just now (test script is attached):

Elapsed time is 4.978532 seconds. % removing elements
Elapsed time is 1.840707 seconds. % keeping elements

Answer 2

[Matt J]

 A(A(:,1)==0,:)=[]  ;