How to change for loop to flip graph?

How do i change my code to get my graph to flip so that the contour lines start at 0.05 and go down, also with the vector lines?

Vo=zeros(6,11);
V(1,:)=V(1,:)+100;
n=1;
k=0;
h = 0.01;
g = 0;
while k==0
    Vo=V;
    k=1;
    for i=2:5
        for j=2:10
            V(i,j)=(Vo(i+1,j)+V(i-1,j)+V(i,j-1)+Vo(i,j+1)+ h^2*g)/4;
           if abs((V(i,j)-Vo(i,j)))>(10^-5)
             k=0;
            end
        end
    end
    n=n+1;
end
n;
x=0:0.01:0.1;
y=0:0.01:0.05;
[px,py] = gradient(V);
figure
contour (x,y,V)
hold on
quiver(x,y,px,py)
hold off

Answer 1

[Cris LaPierre]

We don't have your variable V so I can't verify, but would adding this to the end of your code do it?

ax=gca;
ax.YDir = 'reverse'