%% Number of Polygon Boundaries
% Create a polygon and determine its number of boundaries.

x1 = [0 1 2];
y1 = [0 1 0];
x2 = [2 3 4];
y2 = [1 2 1];
polyin = polyshape({x1,x2},{y1,y2});
plot(polyin)
N = numboundaries(polyin)

% Copyright 2012 The MathWorks, Inc.