how do I integrate a pre-recorded function?

I tried to write it as follows, but it gives an error

syms r theta

p1 = r.* cos(theta);

polarfun = @(r,theta) p1;

q = integral2(polarfun,0,1,0,2*pi)

please tell me how to do this correctly?

Answer 1

[Star Strider]

Try this —

syms r theta
p1 = r.* cos(theta);
polarfun(r,theta) = p1

polarfun(r, theta) = 

polarfcn = matlabFunction(polarfun)                     % Slightly Renamed To Avoid Over-Writing Original

polarfcn = function_handle with value:
    @(r,theta)r.*cos(theta)

q = integral2(polarfcn,0,1,0,2*pi)

q = 1.5446e-14

.