Octave 公式ページ

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