error using integral function

hi everybody,i`m trying to execute this code...

syms x f(x)

f(x)=exp((-x.^2)/2)

f_matlab = matlabFunction(f(x))

v1 = integral(f_matlab,1,2)

but when i do it, i get this problem

Unable to use a value of type function_handle as an index.

Error in (name of script) (line 55)

v1 = integral(f_matlab,1,2)

Does anyone know how to solve it?

Answer 1

[Steven Lord]

Rename the variable you've defined named integral so that it doesn't shadow the integral function included in MATLAB.

[Raul Rodriguez]

Thank you very much, it runs perfect now

Answer 2

[David Hill]

Looks like you are trying to do numerical integration, then no need for symbolic variables.

f=@(x)exp(-x.^2/2);
v=integral(f,1,2);

[Raul Rodriguez]

It still doesn't run :( it is part of an exercise and there are more exercises in the script , if i put it just that execrise in a separate script then it runs, but not always