Don't understand Plot behavior
- To: mathgroup at smc.vnet.net
- Subject: [mg39971] Don't understand Plot behavior
- From: Alain Cochard <al2 at noos.fr>
- Date: Thu, 13 Mar 2003 03:03:58 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:= f[t_]:= D[t , t]
In[2]:= Plot[Evaluate[f[t]] , {t, 0, 1}]
Out[2]= -Graphics- [The plot is fine]
In[3]:= Plot[{Evaluate[f[t]],0} , {t, 0, 1}]
-8
General::ivar: 4.16667 10 is not a valid variable.
[...]
General::stop: Further output of General::ivar
will be suppressed during this calculation.
Plot::plnr: Evaluate[f[t]] is not a machine-size real number at t =
-8
4.16667 10 .
[...]
General::stop: Further output of Plot::plnr
will be suppressed during this calculation.
Out[3]= -Graphics- [The plot just shows the axes]
In[4]:= harhar=Evaluate[f[t]]; Plot[{harhar,0} , {t, 0, 1}]
Out[4]= -Graphics- [The plot is fine]
In[5]:= $Version
Out[5]= 4.1 for Sun Solaris (November 8, 2000)
Is this behavior normal? Thx in advance.
Alain Cochard
al2 at noos.fr