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MathGroup Archive 2005

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Re: Pb with the function Plot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57062] Re: Pb with the function Plot
  • From: "benoit cuisinier" <cuisinier.benoit at neuf.fr>
  • Date: Sat, 14 May 2005 04:57:59 -0400 (EDT)
  • References: <d5tdm9$iim$1@aphrodite.grec.isp.9tel.net> <4282605D.50200@9online.fr>
  • Sender: owner-wri-mathgroup at wolfram.com

hi Jean Marc
thx for ur answer i have resolved mi pb
i have not understand why for some function we need to enter the fullform 
iin Plot but now i have mi graph
the sintaxe i have wrote works on a V2 of Mathematica but not on the V5 ...
thx a lot
"Jean-Marc Gulliet" <jeanmarc.gulliet at 9online.fr> a écrit dans le message de 
news: 4282605D.50200 at 9online.fr...
> Hi Benoit,
>
> The function to be plotted is mistyped:
>
> In[78]:=
> FullForm[x²Sin[x]]
>
> Out[78]//FullForm=
> x\.b2Sin[x]
>
> The line above is interpreted as a Mathematica expression with head x²Sin:
>
> In[81]:=
> Head[x²Sin[x]]
>
> Out[81]=
> x²Sin
>
> Not exactly what you have in mind!
>
> You should have something like
>
> In[79]:=
> \!\(FullForm[\(x\^2\) Sin[x]]\)
>
> Out[79]//FullForm=
> Times[Power[x,2],Sin[x]]
>
> or
>
> In[80]:=
> FullForm[x^2Sin[x]]
>
> Out[80]//FullForm=
> Times[Power[x,2],Sin[x]]
>
> To enter the correct notation for an exponent type either "Ctrl+6" or 
> "Shift+6" (assuming that you work on Windows).
>
> Hope this helps,
> /J.M.
>
> benoit cuisinier wrote:
>> hi
>> I am new with mathematica, I am french and i got a english version so i 
>> got some problem ..
>> can someone explain me the correct synthaxe to have the graphics of 
>> f(x)=x²Sin(x) on [-3,5] bcse i got that :
>> In[39]:=Plot[x²Sin[x], {x, -3, 5}]
>> Plot::plnr: "\!\(x²Sin[x]\) is not a machine-size real number at x = \
>> \!\(\(-2.9999996666666666`\)\). \!\( \*ButtonBox[\(More.\), \
>> ButtonData:>Plot::plnr, ButtonStyle->RefGuideLinkText, 
>> ButtonFrame->None]\)
>>
>> \!\(\*
>> RowBox[{\(Plot::"plnr"\), \(\(:\)\(\ \)\), "\<\"\\!\\(x²Sin[x]\\) is not 
>> a \
>> machine-size real number at \\!\\(x\\) = \\!\\(-2.6754640674166734`\\). \
>> \\!\\(\\*ButtonBox[\\\"More.\\\", ButtonStyle->\\\"RefGuideLinkText\\\", 
>> \
>> ButtonFrame->None, ButtonData:>\\\"Plot::plnr\\\"]\\)\"\>"}]\)
>>
>> ...
>>
>> so if someone can help it will be great
>>
>> thx
>> 


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