Re: What am I doing wrong with this code?

*To*: mathgroup at smc.vnet.net*Subject*: [mg82558] Re: What am I doing wrong with this code?*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Wed, 24 Oct 2007 04:34:59 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <ffkffr$spa$1@smc.vnet.net>

sean_incali wrote: > I think I'm having a brain fart. Seriously... > > Plot[{1/(1 + y^2), (1/y - 1)^(1/2)}, {y, 0, 5}] > > What is wrong with that code? Maybe it's not solvable in mathematica? > > I'm trying to plot nullclines of a system of ODEs. and those function > up there are them. I just can't get mathematica to plot them in the > same graph. > > I get an error message saying... > >>From In[22]:= > (1/y - 1)^(1/2) is not a machine-size real number at y = > 1.0000001666666667`. > > Any help is appreciated. Well, are you fooling yourself? The above command works very well on my system (PC x86-32, Windows XP SP2, Mathematica 6.0.1) as you can see at http://homepages.nyu.edu/~jmg336/mathematica/seanincali.pdf Try a fresh kernel (I suspect that 'y' got some conflicting definition during your session). Regards, -- Jean-Marc