MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: newbie PolarPlot question

  • To: mathgroup at
  • Subject: [mg25055] Re: newbie PolarPlot question
  • From: quizzik at (Thomas Anderson)
  • Date: Thu, 7 Sep 2000 22:27:59 -0400 (EDT)
  • Organization: Stanford University
  • References: <8ov0jn$>
  • Sender: owner-wri-mathgroup at

>>  I've defined:
>>  r[t] := 16/(5 + 3 Cos[t])

(when this is used in PolarPlot, error messages are generated)

The problem here comes from an important bit of syntax that is missing
from your definition. As stated above, 'r' is defined only for the
't', not for a variable in general. 

What you want is:

    r[t_] := 16/(5 + 3 Cos[t])

The underscore indicates that 't_' is a *pattern* which stands for any
value supplied as an argument to 'r'.

Happy plotting!


  • Prev by Date: Re: Simple integral wrong
  • Next by Date: Re: mobius strip
  • Previous by thread: newbie PolarPlot question
  • Next by thread: Re: newbie PolarPlot question