Streamline plot not complete

I have been trying to make this streamline plot, unfortunately I have not been able to make it complete. I have looked on different forum pages but was not able to find a solution.

My code:

clear, clc

Gamma=-4;
a=1;
b=1;
Q=1;
[x,y]=meshgrid(-1:0.05:4,-1:0.05:1);

u= (y./(2*pi.*(x.^2+y.^2)))...
    +(((2*Q.*b)/((a^2)*pi.*Gamma))...
    .*((2*y.*(x-1))./((x.^2+y.^2-2.*x+1).^2)));
v= -((x)./(2.*pi.*(x.^2+y.^2)))...
    -(((2*Q*b)./((a^2)*pi.*Gamma))...
    *(((x.^2-y.^2-2.*x+1)./((x.^2+y.^2-2.*x+1).^2))));

hold on , clf
figure(1)
    quiver(x,y,u,v)

    N = 15; 
    startx = max(x).*rand(N,1); 
    starty = max(y).*rand(N,1); 
        streamline(x,y,u,v,startx,starty)
    startx2 = -max(x).*rand(N,1); 
    starty2 = -max(y).*rand(N,1); 
        streamline(x,y,u,v,startx2,starty2)
    startx3 = rand(N,1); 
    starty3 = rand(N,1); 
        streamline(x,y,u,v,startx3,starty3)
hold off

Answer 1

[darova]

Works ok for me

N = 15; 
xx = linspace(min(x(:)),max(x(:)),10);
yy = linspace(min(y(:)),max(y(:)),10);
[startx,starty] = meshgrid(xx,yy);
streamline(x,y,u,v,startx,starty)

[Eddward]

Thank you for your response, had to change 10 to 50 for my plot.

Thank you very much.