MATLAB: How to square a column in a matrix

Question

Hello,

I have a 7×3 matrix and the last column needs to have each entry squared. How do I square the one column while keeping it in the same Matrix?

Thanks, Marisol btw…. I am BRAND new to Matlab

Answer 1

X = your 7x3 matrix
X(:,3) = X(:,3).^2;  % replace 3rd column with its square (element-wise)

Note the dot in front of the ^ operator. That dot indicates element-wise operation. There are also .* and ./ for element-wise multiplication and element-wise division operators. The ^ and * and / without the initial dot indicates matrix operations (instead of element-wise operations).