integration error in matlab

Question

nikhil 2020-5-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524577-integration-error-in-matlab

评论： nikhil 2020-5-11

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

Hi all,

i am trying to solve the above equation in matlab, but i am getting an error as Error in integralCalc while solving the code

any suggestions and thanks in advance

clc;
clear;
 ro = 17.5; R = 65;
a1 = 1/2*((((1+4*(ro.^2))/(1-(ro.^2))).^(1/2)) -1);
a2 = -1/2*((((1+4*(ro.^2))/(1-(ro.^2))).^(1/2)) -1);
% let X0<x<1.22*X0 replace X0 with ro and 1.22*X0 as b
b = 1.22*ro;
% first condition R (main radius = 65) R>r>b
x = b:5:R;
y = ro:0.45:b;
func1 = @(x)((-x.^3)/((1-x.^2).*((x.^2)-a1).*((x.^2)-a2)).^(1/2));
i = zeros(size(x));
for c = 1:length(x)
i(c) = integral(func1,0,x(c));
end
func2 = @(y)((-y.^3)/((1-y.^2).*((y.^2)-a1).*((y.^2)-a2)).^(1/2));
i = zeros(size(y));
for c = 1:length(y)
i(c) = integral(func1,0,y(c));
end