If I want CVX to give me the pairwise differences of the elements of a vector `X`

, what is the most efficient way to do so? In standard MATLAB I would normally use `bsxfun(@minus, X, X')`

, but CVX objects do not support `bsxfun`

).

If `X`

is a column vector, this will work:

`X*ones(size(X))' - ones(size(X))*X'`