How Do I Solve This Complex Integral in MATLAB?

[hore69]

hello , somebody could help me to solve in MATLAB this integral?
$$r(\alpha) =\frac{1}{\theta} \int_{0}^{\theta} \ e^{-jk*2Rsin(\sigma/2)sin(\sigma/2+\alpha) } \,d\sigma$$
I have tried to solve it but it gives this error :

Warning: Explicit integral could not be found.
> In C:\MATLAB6p5\toolbox\symbolic\@sym\int.m at line 58
In C:\MATLAB6p5\work\directividadCurvado.m at line 12
? Error: Assignment statements do not produce results. (Use == to test
for equality.)

Error in ==> C:\MATLAB6p5\toolbox\symbolic\@sym\double.m
On line 45 ==> D = reshape(eval(X),m,n);

Error in ==> C:\MATLAB6p5\work\directividadCurvado.m
On line 12 ==> ppp=double(int(exp(-i*k*2*R*sin(x/2).*(sin(x/2)+t)),'x','0','ang'));

please help me. Excuse me by my writing. Thanks.

 

[dextercioby]

U can't solve it. Try Matlab with a simpler integral

$$\int e^{\sin x} \ dx$$

Daniel.