# My first question: When using desolve_system_rk4(), is there a way to see the plots of the dependent variables vs. the independent variable? Thanks.

```
x,y,t=var('x y t')
#x=function('x',t)
P=desolve_system_rk4([x*(1-y),-y*(1-x)],[x,y],ics=[0,0.5,2],ivar=t,end_points=20)
P=P+desolve_system_rk4([x*(1-y),-y*(1-x)],[x,y],ics=[0,0.3,2],ivar=t,end_points=20)
Q=[ [i,j] for i,j,k in P]
LP=list_plot(Q)
# Q=[ [j,k] for i,j,k in P]
Q=[ [j,k] for i,j,k in P]
LP=list_plot(Q)
show(LP)
plot(x);plot(y) #Doesn't work
```