I need to create a function that projects vector b onto vector a

I need to create a function that projects vector b onto vector a. I know that all elements of b is 1, and that it has the same dimensions as a. My function needs to work for all dimensions. How do i do this??? Especially the part of defining b

So far i have written this

function projection = computeProjection(a)

projection = (dot(a,b)/norm(a))*a;

Answer 1

[John D'Errico]

All you are missing is that b is a vector of ones, of the same size as a?

b = ones(size(a));

At least, that is all you think you need. In fact, you need to modify the formula slightly, to be:

projection = (dot(a,b)/norm(a)^2)*a;

You needed another factor of norm(a) in there to make it work.