polyarea: Determines area of a polygon by triangle method.
Determines area of a polygon by triangle method. The variables
x and y define the vertex pairs, and must therefore
have the same shape. They can be either vectors or arrays. If
they are arrays then the columns of x and y are
treated separately and an area returned for each.
polyarea(x, y, d = 1)
X coordinates of verticies.
Y coordinates of verticies.
Dimension of array to work along.
Area(s) of polygon(s).
If the optional dim argument is given, then polyarea
works along this dimension of the arrays x and y.