Graphs X vs. Y using Cartesian coordinates.
This function is for the deprecated PQG graphics. Use
x (Nx1 or NxM matrix) – Each column contains the X values for a particular line.
y (Nx1 or NxM matrix) – Each column contains the Y values for a particular line.
Missing values are ignored when plotting symbols. If missing values are encountered while plotting a curve, the curve will end and a new curve will begin plotting at the next non-missing value.