# phase-line2.ode
# one-dimensional autonomous system
f(x,t)=x*(x-.25)*(1-x)+a0+a1*sin(w*t)
par a0=0,a1=0,w=0
x'=f(x,t)
init x=.26
# transformation information for the animator
par x0=-.5,x1=1.5,y0=-1,y1=1
tr(x)=x0+(x/100)*(x1-x0)
ff(x,s)=(f(tr(x),s)-y0)/(y1-y0)
@ ylo=-.25,yhi=1.25,total=40,xhi=40
done