Using integral to define a function

So I'm trying to define a function which has an integral inside.

Below is a simplified version of the function with the same error message: Unrecognized function or variable 'E'.

What I don't get is since variable E goes away after integral, shouldn't there be no reason for me to define it?

Also, how could this problem be resolved?

Thanks in advance.

result(0)

function test_integral = result(V)
   
    test_integral = integral( @temp, E, -1, 1);

    function tempf = temp(E)
        tempf = E.*V;
    end

end

Answer 1

[Dyuman Joshi]

Remove the E from the integral() call, as it is not required.

Refer to the documentation of integral to know more about the syntax of the function.

result(2)

ans = -1.1102e-16

result(4)

ans = -2.2204e-16

result(6)

ans = -3.3307e-16

function test_integral = result(V)
   
    test_integral = integral(@temp, -1, 1);
    function tempf = temp(E)
        tempf = E.*V;
    end
end