matlab求面积圆：(X - a)^2+ (Y - b)^2= R2,Y1,Y2,Y轴围成的面积为2∫Y2(上）Y1（下）(sqrt(R^2-(Y-b)^2)+a)dY,没错吧--!刚接触matlab,不太会,麻烦大神把过程也发给我,S=

Question

matlab求面积
圆：(X - a)^2+ (Y - b)^2= R2,Y1,Y2,Y轴围成的面积为
2∫Y2(上）Y1（下）(sqrt(R^2-(Y-b)^2)+a)dY,没错吧--!
刚接触matlab,不太会,麻烦大神把过程也发给我,
S=

Answer 1

我没看明白你问题的几何意义,我只能根据你写的数学表达式,给出相应的matlab求积分程序.
Y1 = 0.5; Y2 = 1.5;
a = 1; b = 1; R = 1;
fun = @(Y) sqrt(R^2-(Y-b).^2)+a;
Int = quad(fun,Y1,Y2);
S = 2*Int