Plotting Phase Plane in Matlab

I have solved the matrix by hand and I found the general solution. If I wanted to plot the phase plane on Matlab, how would I go about doing that?

Here is an example of the general solution for the phase plane I want to plot:

x(t)=c1e^-3t+c2e^-t

y(t)=-c1e^-3t

Both c1 and c2 are constants

Answer 1

[Matt J]

For example,

funx=@(t)  c1*exp(-3*t)+c2*exp(-t);
funy=@(t) -c1*exp(-3*t);

fplot(funx,funy,[0,1])

or

t=linspace(0,1,100);
x=  c1*exp(-3*t)+c2*exp(-t);
y= -c1*exp(-3*t);

plot(x,y,'x')