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Plot[x Sin[x],{-100,100}] Bad {-100,99} Good?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38268] Plot[x Sin[x],{-100,100}] Bad {-100,99} Good?
  • From: "Steven T. Hatton" <hattons at globalsymmetry.com>
  • Date: Tue, 10 Dec 2002 04:12:41 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

This is Mathematica 4.2 on Linux.  I evaluated Plot[x Sin[x], {-100,100}] and 
disvovered that the portion of the plot between,9.5Pi and 11Pi is displayed 
as a line segment joining the points {9.5 , 9.5 Sin[9.5]} and {11 , 11 
Sin[11]}.  I've also found that the plot from x=-100 to x=99.99 is incorrect.  
The plot over the range [-100,99] is correct.  What is happening here?  Does 
this happen on other systems?
-- 
STH
Hatton's Law: 
"There is only One inviolable Law."



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