How to get a matrix with different row lengths?

I have a two dimensional matrix "check" of zeros and ones. I need to check the ones in each row, take the indexes of ones and store in another matrix. the number of ones are different in each row so the resultant matrix will have different lengths. How do i store them in one matrix?

for i=1:length(NewAps_1)

I2(i,:)=find(check_Naps(i,:))

end

the I2 matrix is the resultant matrix.

Answer 1

[Ameer Hamza]

You cannot do that in matrices, because matrix rows need to be equal length. For that, you will need cell array. You can do the following to make cell array

I2 = cell(1, length(NewAps_1));
for i=1:length(NewAps_1)
  I2{i}=find(check_Naps(i,:));
end

[Sohaib Bin Altaf]

thanks a lot for your reply. But what if i get the required indexes of the ones from each row, and to make the rows of the resultant matrix i.e.I2 equal it adds zeros so the I2 matrix has equal length rows.

like

12 23 33 45 56 70

2 15 40 0 0 0

I may need an extra variable in loop which adjusts the size accordingly.

[Ameer Hamza]

Yes, you can do that, but it will be messy and a bit difficult to use when you want to again get value for the indexes. Not to mention if a row has more number of indexes than all the previous rows, you will need to expand the entire matrix to make room for new row.

[Sohaib Bin Altaf]

Thanks a lot sir for your help. God bless you.

[Ameer Hamza]

You are welcome.