This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.


Area of polygon


A = polyarea(X,Y)
A = polyarea(X,Y,dim)


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.


collapse all

L = linspace(0,2.*pi,9);
xv = 1.2*cos(L)';
yv = 1.2*sin(L)';

A = polyarea(xv,yv)
A =


title(['Area = ' num2str(A)])
axis image

Introduced before R2006a

Was this topic helpful?