polyarea - Area of polygon
Syntax
A = polyarea(X,Y)
A = polyarea(X,Y,dim)
Description
A = polyarea(X,Y) returns the area
of the polygon specified by the vertices in the vectors X and Y.
If X and Y are matrices of the
same size, then polyarea returns the area
of polygons defined by the columns X and Y.
If X and Y are multidimensional
arrays, polyarea returns the area of the polygons in the
first nonsingleton dimension of X and Y.
A = polyarea(X,Y,dim) operates
along the dimension specified by scalar dim.
Examples
L = linspace(0,2.*pi,6); xv = cos(L)';yv = sin(L)';
xv = [xv ; xv(1)]; yv = [yv ; yv(1)];
A = polyarea(xv,yv);
plot(xv,yv); title(['Area = ' num2str(A)]); axis image
See Also
convhull, inpolygon, rectint
 | poly | | polyder |  |
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