How to solve error A and B must be floating point scalar?

I'm trying to integrate a function which is

Below is my code

q=1;
y=10;
v=3.5;
t=1;
z=v*t;

syms pi theta x1 x2

a=-(q*x1*v)/4*pi;

b=(0.5*x1)- (y*cos(theta));

c=(y.^2)+((0.5*x1).^2)+(x1*y*cos(theta));

d=z+(0.5*x2);

e=z-(0.5*x2);

f=(c+(d.^2)).^0.5;

g=(c+(e.^2)).^0.5;

h=@(theta)(b/c)*((d/f)-(e/g));

i=integral(h,0,2*pi);

p=a*i;

I get the error A and B must be floating point scalars. How can I solve this? Many thanks for your help.

p/s: (x1=l) and (x2=w) are the variables that I will optimized using PSO. I will call this function in my PSO code.

Answer 1

[Ahmet Cecen]

You are using the wrong integral function. Symbolic integrals are calculated using 'int' instead. So keep your h as an expression:

 h=(b/c)*((d/f)-(e/g));
 i=int(h,theta,0,2*pi);

[aisyah johari]

Thank you sir,

However, I got a warning explicit integral could not be found so it affects my PSO output. Is there any other way of writing this function?

[nafeesa saleh]

Try to calculate int with double. example: double(int(x,0,1))