symbolic Integration in Matlab

Hi,

Can anyone help me out in solving the foll relation having integration using Matlab:

S=2*v*Im[{int, 0 to 1(exp(j*b*R1)rdr }* {int, 0 to 1(R2*exp-j*b*R1)rdr}]

Where: v=pi, R1=sqrt(3)*(2*r.^2-1),R2=sqrt(3)*(2*r.^2-1),Im=imaginary, j=sqrt(-1),b=0.7,int=integration.

This might be an easy one, but I tried many times but could not solve to get the right ans. I hope that the ans should be a single value. But I got the ans in the form of a matrix of dim(64x64).

Please help me out with the coding how to solve this.

Thanking You!

Answer 1

[William]

Are you using the syms command which is in the symbolic toolbox? If you're attempting to integrate with a variable that has not been defined without the toolbox your code will not work.

Please post the actual command as you input it into MATLAB

[Pranjal Pathak]

Thanks for your answer.

Answer 2

[Andrei Bobrov]

syms r
R1=sqrt(3)*(2*r.^2-1)
R2=sqrt(3)*(2*r.^2-1)
b = .7;
S=2*pi*imag(int(exp(1i*b*R1)*r,r,0,1)*int(R2*exp(-1i*b*R1)*r,r,0,1))
out = vpa(S)

R1 = R2 ?