Plot a system of ODE, not against time

Hi, I'm wanting to plot a graph of x(3) against x(1) witht the following code, bit I can't see how I can do this without plotting them aganist time

my code so far is

function [T,X] = fig7a()
tspan=[0 150];
x2_0=0;
x4_0=0;
x5_0=1;
[T_1,X1] = ode15s(@odesys1,tspan,[ x2_0  x4_0 x5_0]);

plot(T_1,X1(:,1))

end

with odesys1 as another document with a system of 5 ode

Answer 1

[madhan ravi]

plot(x(:,1),x(:,3))

[madhan ravi]

if the answer worked make sure to accept the answer

[Becca Andrews]

Thanks, this now plots, however, it's not plotting what I expect, could it be there is something else wrong with my code?

[madhan ravi]

probably..