Plotting infinite series on interval

I have the following function for error approximation

function y = Approx(x,N); 
Approx=zeros(1,length(x));
for n=0:N
    Approx=Approx+(((-1)^n)*x^(2*n+1))/((factorial(n))*(2*n+1));
    
end
Approx=(2/sqrt(pi))*Approx

My question is how would I plot this on a given interval say -1,1 as well as plotting it again the built in erf in Matlab