varea.m 1.0

Compute the area and judge the direction of a closed curve.function area=varea(C)%VAREA compute the "sign-area" of a closed curve.% NOTE: Sign-area equals to the area of the closed curve when it is in anti-clockwise and equals to the negative area when it is in clockwise.% Negative area means equal to area in magnitude but is negtive in sign.We can see that this script may also be used to judge the direction of a closed curve.% C provides the coordinats of the nodes of the curve in the following way:% C=[x1 x2 ...% y1 y2 ...]% AREA=VAREA(C)% AREA returns the area of the curve(>0) when it is in anti-clockwise% AREA returns the negtive area of the curve(

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	Coordinats,  Curvegt,  Curvelt,  Equal,  Magnitude,  Negtive,  Nodes,  Script,  Signwe
Users rating:	0/10