Streamline Not Displaying On 2D Vector Field

I am trying to plot a streamline of a negative 2D vector field. When I plot the positive version of the equation, I get this:

Okay, great. Now to change the V_0 variable from 1 to -1:

Despite messing with startx and starty to try and make it plot, I cannot figure it out. Using the Plot Browser, there is clearly something there, but it looks like an array of independent data points instead of a line curve:

Footnote: I acknowledge the clunkiness of two startxs and two plot commands, but when one startx and plot command are alone, streamlines only plot on one side of x = 0. Code:

Any help greatly appreciated.

V_0 = -1;                                       % When this is positive, I get the first graph image.  When it is negative, I get the second.
L = 2;
x = (-1:0.1:1);
y = (0:0.1:1);
[X,Y] = meshgrid(x,y);
u = (V_0/L)*(-2*X);
v = (V_0/L)*(Y);
quiver(X,Y,u,v);

starty = (-2:0.025:2);                          % I know the issue exsits with this
startx1 = ones(size(starty));                   % and/or this

hold on
streamline(X,Y,u,v,startx1,starty)

startx2 = ones(size(starty))*min(x);            % and/or this, but cannot determine the issue.  This code generates no errors.

streamline(X,Y,u,v,startx2,starty)

[KSSV]

You can try streamslice.

[Justin Purser]

KSSV,

Thank you. That actually worked really easily.

After revisiting my previous code, a slightly clunkier method was to define the meshgrid for startx and starty.

...
starty = (-2:0.025:2);
startx1 = ones(size(starty));
[startx1,starty] = meshgrid(-1:0.1:1,0:0.1:1);   

hold on
...

Thanks again for your help.