% Perform polynomial interpolations of x and y with respect to t,
% and plot x and y against one another.
% x and y should be pre-set, and same length as t.

t  = 1:11;
cx = polyfit(t,x,length(t)-1);
cy = polyfit(t,y,length(t)-1);

t = 1:0.1:11;
polyx = polyval(cx,t);
polyy = polyval(cy,t);
plot(polyx,polyy)