1. elementary row operation for "matrix".
I would like to perform elementary row operation for Matrix.
[ 1, 1, 2] first Row of Matrix A -> Row1
[ 2, 4, -3] 2nd Row of Matrix A -> Row2
[ 3, 6, -5] 3rd Row of Matrix A -> Row3
In this Matrix named "A", I plan to perform Row2 + (-2)*Row1.
Row(A, 2) - 2*(Row(A,1) is work well.
But I can not return the value to Row2 of Matrix A.
I know the Matrix( [ 1, 0, 1], [-2, 1,0], [0, 0, 1]).A is good
another way.
But I want know how to do.
2. About a norm of vector.
I try to find the function that return the norm of a vector.
But I don't find. So I have done like bellows.
B:[2,2]
ABS(B.B)
That's I performed. Is there any simple way to get a norm of vector
like ||B|| or Norm(B).
Thank you.