The pldj command also connects points, but as disjoint line segments:
connects (x0(1),y0(1)) to (x1(1),y1(1)), then
(x0(2),y0(2)) to (x1(2),y1(2)), and so on. Unlike plg,
where y and x are one dimensional arrays, the four arguments to pldj may
have any dimensionality, as long as all four are the same shape.