Undefined function or method 'int' for input arguments of type 'double'.

Hi Everybody, I need your help please. When I run my following script:

x=-3:.1:3;

Go=1000;

Bc=5;

Pin=3*exp(-x.^2);

Ein(i)=int(Pin,x,-inf,inf);

for i=1:length(x);

      z=x(i);

      Eo(i)=int(Pin,x,-inf,z);

      E(i)=Eo (i)/Ein(i);

      G(i)=Go/(Go-(Go-1)*exp(-E(i)*0.1));

      Pin=3*exp(-x(i)^2);

      Pout(i)=Pin*G(i);

      Phi(i)=-0.5*Bc*log(G(i))*pi/180;

      Aout(i)=sqrt(Pout(i))*exp(i*Phi(i));

end

Aoutf=fftshift(fft(Aout,100000));

f=(-100000/2:(100000/2-1)).*1/(0.01*100000);

Poutf(i)=abs (Aoutf).^2;

plot(f,abs(Poutf),'-r*')

I get this error

Undefined function or method 'int' for input arguments of type

'double'.

Do you know how can I solve that please?

Answer 1

[bym]

Int is only defined for symbolic variables, for numeric values see

quadgk()