Simple Problem (I suppose...)

• To: mathgroup at smc.vnet.net
• Subject: [mg22102] Simple Problem (I suppose...)
• From: kallmeyer at bigfoot.com (Andreas Kallmeyer)
• Date: Mon, 14 Feb 2000 02:03:53 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

```Hi!

I just got Mathematica 4 and when I try such easy calculations as below
and then I can't plot the result.... WHY?? I really have no clue.

Thanks,

Andreas.

Here my text is clipped:
"
In[1]:=
Remove["Global'*"]

Remove::"rmnsm": "There are no symbols matching \"\!\(\"Global'*\"\)\"."

In[2]:=
\!\(f[\(x\_-\)] := \ x\^5 + x\^4 + x\^2\)

In[3]:=
Plot[f[x], {x, -10, 10}];

Plot::"plnr": "\!\(f[x]\) is not a machine-size real number at \!\(x\) =
\
\!\(-9.999999166666667`\)."

Plot::"plnr": "\!\(f[x]\) is not a machine-size real number at \!\(x\) =
\
\!\(-9.188660168541684`\)."

In[4]:=
\!\(f2[\(x\_-\)]\  = \ \[PartialD]\_x f[x]\)

Out[4]=
\!\(\*
RowBox[{
SuperscriptBox["f", "\[Prime]",
MultilineFunction->None], "[", "x", "]"}]\)

In[5]:=
?f2

In[6]:=
\!\(f2[x]\  = \ \[PartialD]\_x f[x]\)

Out[6]=
\!\(\*
RowBox[{
SuperscriptBox["f", "\[Prime]",
MultilineFunction->None], "[", "x", "]"}]\)
"

```

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