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MathGroup Archive 2003

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Re: Part 2 of a recent post on Plot and v 5

  • To: mathgroup at smc.vnet.net
  • Subject: [mg44411] Re: [mg44358] Part 2 of a recent post on Plot and v 5
  • From: Tomas Garza <tgarza01 at prodigy.net.mx>
  • Date: Sat, 8 Nov 2003 04:50:54 -0500 (EST)
  • References: <200311071016.FAA05351@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Well, probably Mathematica suspects that nothing "interesting" is going to
happen outside the range -1 <= x <= 1, since no further change in the
function values is expected. You may add the option PlotRange -> {{-1,
5},{0, 1}} to obtain the picture as you desire.

Tomas Garza
Mexico City
----- Original Message ----- 
From: "Mariusz Jankowski" <mjankowski at usm.maine.edu>
To: mathgroup at smc.vnet.net
Subject: [mg44411] [mg44358] Part 2 of a recent post on Plot and v 5


> Dear colleagues, I recently posted a question about the apparent change to
Plot in version 5. I gather from the responses (thank you) that this new
feature seemed natural or even desirable. That surprised me, so let me
explain.
>
> I used
>
> Plot[UnitStep[x], {x, -1, 5}];
>
> and found that Mathematica chose to display the function in the "more
interesting" range of -1<=x<=1.
>
> My opinion is that an EXPLICITLY given range in any of the graphics
commands should not be overridden, under any circumstances. Is there anyone
who agrees with me? I would love to hear some of the opinions for and
against, especially the former, because I can't think of any.
>
> Finally, if this indeed is a new feature, can anyone explain the algorithm
that is used to choose the "interesting" interval and is it used in any
other 2D graphic functions, and density or contour plots?
>
> Thanks, Mariusz
>



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