Here's the list of expressions used in Octave. Octave official page

 1.Checking the size of a matrix A = [2 2; 3 3; 4 4;]; size(A)⇒(3,2) size(A,1)⇒(3) 2.Generating a random matrix A = randi([1 4],3,5)⇒ 3 4 4 4 3 4 1 2 2 2 4 4 2 1 3 3.Transpose Matrix I = ones(1,5)⇒ 1 1 1 1 1 IcolV = I'⇒ 1 1 1 1 1 A * IcolV⇒ 18 11 14 4.Powering and Multiplication at each element M = [1 3; 2 2; 2 3;]; M.^2⇒ 1 9 4 4 4 9 N = [1 3; 2 2; 2 3;]; M .* N⇒ 1 9 4 4 4 9