Problem 198. Are you in or are you out?
Given vertices specified by the vectors xv and yv, and a single point specified by the numbers X and Y, return "true" if the point lies inside (or on the boundary) of the polygon defined by the vertices.
% The specified point is the center of the unit square: xv = [0 1 1 0]; yv = [0 0 1 1]; X = 0.5; Y = 0.5;
inside(xv,yv,X,Y) -----> true
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