x
n+1
=
*x
n
+
*x
n-1
Initial values
and
<![CDATA[ //Setup window nmax=20; ScaleWindow(-0.5,-3,nmax,3); DrawAxes(0,-3,nmax,3); a1=document.buttons.coeff1.value; a2=document.buttons.coeff2.value; oldx=document.buttons.x1.value; x=document.buttons.x2.value; Colour("blue"); MoveTo(0,oldx); LineTo(1,oldx); MoveTo(1,x); LineTo(2,x); Colour("black"); n=2 loop(); ]]>
<![CDATA[ //Loop window rememberx=x; x=a1*x+a2*oldx MoveTo(n,x); LineTo(n+1,x); n=n+1; oldx=rememberx; // console.log(n,a1,a2,x,oldx); document.buttons.xnow.value=x; if(n<nmax){setTimeout("loop();", 500);} ]]>