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RE: Simple question

  • To: mathgroup at
  • Subject: [mg29458] RE: [mg29426] Simple question
  • From: "David Park" <djmp at>
  • Date: Wed, 20 Jun 2001 04:36:39 -0400 (EDT)
  • Sender: owner-wri-mathgroup at


Use the Normal command.

e1 = Series[Sin[x], {x, 0, 3}]
SeriesData[x, 0, {1, 0, -1/6}, 1, 4, 1]  (in Input Format, normal display
look different. )

f[x_] = Normal[e1]
x - x^3/6

Plot[{Sin[x], f[x]}, {x, 0, 2}];

David Park
djmp at

> -----Original Message-----
> Dear Sirs/Madame;
>  I tried using the Series[] function to generate a series expansion
> (polynomial in the dependent variable) for a relatively simple function,
> which M did nicely, but it insistes on including an "order of" term
> (O[stuff*dep_var]) at the end of the polynomial. When I try to plot this
> function, M insists on including it in the evaluation so that the
> O[] term
> is a non-numerical value and hence cannot be plotted. How do I get rid of
> this pesty appendage?? I tried a simple cut-paste, but even if I
> explicitly
> delete the "order of" symbol, M somehow restores it!!! (I ask M
> to list the
> function before trying to plot it, and presto, there is the "order of"
> thing AGAIN. Please, can anyone explain to me how to get around this
> problem. Many Thanks for your assistance.!!!!!!!

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