The limit(M) function computes the element-wise limit of M.  The result, R, is formed as R[i,j] = limit(M[i,j], x, a, direction).

F = limit(f) is the limit of the scalar f at point 0.

limit(f,a) is the limit of the scalar f at point a.

limit(f,x,a) is the limit of the scalar f when variable x approaches a.

limit(f,x,a,direction) is the one-sided limit of the scalar f when variable x approaches a.