error in integral equation

clc
clear
% t =  -(r^3)*sqrt((R)^2-(ro)^2);
% k= sqrt(((R)^6*(r^2-ro^2))-((r)^6*(R^2-ro^2)));
% z = t/k;
R = 65; ro = 17.5;
syms r
func1 = @(r) PI*((-(r^3).*sqrt((R)^2-(ro)^2))/(sqrt(((R)^6.*(r^2-ro^2))-((x)^6*(R^2-ro^2)))))*r.^2;
j = integral(func1, 65,17.5);

Hi all,

I am trying to solve this code in matlab, but i am getting an error as

Error in integral (line 88)

Q = integralCalc(fun,a,b,opstruct);

Error in performance_factor_optimal (line 9)

j = integral(func1, 65,17.5);

any suggestions thanks in advance

Answer 1

[Walter Roberson]

Each place that you have r^ change that to r.^

Change / to ./

Change * to .*

Also we need to see the source code for the function x that you are calling without parameters.

[nikhil]

Thanks for your time @walter roberson

Now code is working perfectly