MATLAB: Deleting rows and columns

matrixsample

I have a 359×479 matrix. I want to down-sample it by removing every 2nd, 4th, so on… row and column. Which is the best method?

try accessing x vector/matrix by index e.g.

x = x( 1:2:end , 1:2:end );

K = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16]
nr=1;
nc=1;
K(nr,:)=[]
K(:,nc)=[]
nr1=4;
nc1=4;
K(nr1-1,:)=[];
K(:,nc1-1)=[]

Not sure if you have a 1201x1 or a 1203x1. But to delete the last row:

b(end,:) = [];

To retain the first 1200 rows:

b = b(1:1200,:);

If b is 1201x1 these will give the same result.

Since you have a column vector I really didn't need the : for the columns, but decided to include it since that form will work for a matrix also.