Matlab - select all rows starting with a particular number

2
votes

Say I have a matrix A, and I want to construct a matrix B that contains all rows of B that start with a particular number. How? Thanks

1
matlabindexing

1 Answers

9
votes

Select all rows of B into A, where the first colum of B has value n:

A = B(B(:,1) == n,:);

In contrast to that, the following selects all rows of B into A, starting from row index n: 

A = B(n:end,:);