RE: Can we plot graphs over really small intervals?

*To*: mathgroup at smc.vnet.net*Subject*: [mg18356] RE: [mg18319] Can we plot graphs over really small intervals?*From*: "Ersek, Ted R" <ErsekTR at navair.navy.mil>*Date*: Wed, 30 Jun 1999 14:13:24 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Ranko Bojanic wrote: ---------------------- I know the function f[x_] := 10 x^4 + Log[2 - x]; has a zero in the interval [2 - 10^(-69), 2 - 10^(-70)] but I cannot draw the graph of f over that interval. Mathematica says that x in {x, 2 - 10^(-69), 2 - 10^(-70)} must have distinct numerical values. --------------------------- You can make a change of variable so your small interval is near the origin. The line below will make an acceptable plot. Plot[10*(2 + u)^4 + Log[u], {u, 10^-69, 10^-70}, PlotRange -> All]; If you don't make the change of variable you can't easily label the tick marks on the horizontal axis even if you did get a graphic. Regards, Ted Ersek