arrays - How do i replace all elements of a vector with a scalar

Question

I have a vector (or array)

A = [2 3 4]

I want to replace all elements of each row with a scalar value of 4. I have the code:

for ii = 1: size(A, 1) A(ii,:) = 4 end

This returns A = [4 4 4]. How can i obtain a 1x1 matrix: A = [4] rather than the 1x3 matrix?

Many thanks in advance.

Answer 1

You can replace the NxM vector/matrix/array with a scalar variable by just assigning it a scalar.

Example:

>>> A = [1,2,3]
A =
    [1 2 3]
>>> A = 4
A =
    4

If I remember right, a scalar in MATLAB is a 1x1 matrix