Re: Making plots using transformation rules

*To*: mathgroup at smc.vnet.net*Subject*: [mg71942] Re: Making plots using transformation rules*From*: Bill Rowe <readnewscix at earthlink.net.invalid>*Date*: Tue, 5 Dec 2006 06:04:40 -0500 (EST)*References*: <el128e$5h8$1@smc.vnet.net>

In article <el128e$5h8$1 at smc.vnet.net>, amannuc at yahoo.com wrote: > I've read about making plots of functions, for example: > Plot[Evaluate[f[x]], {x, 0, 10}] > I don't have this sort of function to plot. Because it involves > derivatives, I only get numerical output after defining a > transformation rule. A simple example (not the real one) is the > following: > g[t_] := D[t^2, t] > g[t] /. t -> 1 > I cannot evaluate g[1], because then Mathematica thinks I am trying to > take a derivative with respect to the number 1, and flags that as > error. So I need the transformation rule to get function values. > What is the best way to plot g[t]? Probably the simplest way to do what you want would be to symbolically evaluate g[t] and plot the resulting expression, i.e., In[1]:=g[t_]:=D[t^2,t] In[2]:=f=g[x] Out[2]=2 x In[3]:=Plot[f,{x,0,2}]; -- To reply via email subtract one hundred nine