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MathGroup Archive 2004

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RE: In Plot, horizontal range is reduced depending on PlotRange

  • To: mathgroup at smc.vnet.net
  • Subject: [mg49626] RE: [mg49582] In Plot, horizontal range is reduced depending on PlotRange
  • From: Alain Cochard <alain at geophysik.uni-muenchen.de>
  • Date: Sun, 25 Jul 2004 02:55:28 -0400 (EDT)
  • References: <200407240747.DAA05766@smc.vnet.net> <NDBBJGNHKLMPLILOIPPOIEBMECAA.djmp@earthlink.net>
  • Reply-to: alain at geophysik.uni-muenchen.de
  • Sender: owner-wri-mathgroup at wolfram.com

David Park writes:

 > Alain,
 > 
 > Is this what you wanted?
 > 
 > Plot[Exp[-10000 t^2], {t, 0, 1}, PlotRange -> {{0, 0.03}, {-.5, 1}}];
 > 
 > If you specify only a single plot range it refers to the vertical
 > range. 

Yes, this I new, and what I wanted was to have the horizontal range
displayed from 0 to 1.  I thought that using {t,0,1} was precisely
supposed to accomplish that (it indeed does it if I don't specify any
PlotRange), and not from 0 to about 0.53, as I described in my initial
message. 

Now, using 2 ranges in PlotRange, as you suggest (this, I didn't know)
does want I want:

    Plot[Exp[-10000 t^2], {t, 0, 1}, PlotRange -> {{0, 1}, {-.5, 1}}];

So I still have the question: is it normal that Mathematica can overrule my
{t,tmin,tmax} specification.  Besides, if, e.g., I use {t,1,2} with
PlotRange -> {-.5,1}, then the horizontal axis is indeed displayed
from 1 to 2 (and this was the first time in years that this happened
to me).  In other words, is there a way to know in advance, for a
given choice of {t,tmin,tmax}, what is the {t,tmmamin,tmmamax} Mathematica is
going to use, and what is the rationale behind that.

Many thanks, David.
Alain Cochard

 > 
 > David Park
 > djmp at earthlink.net
 > http://home.earthlink.net/~djmp/ 
 > 
 > From: Alain Cochard [mailto:alain at geophysik.uni-muenchen.de]
To: mathgroup at smc.vnet.net
 > 
 > 
 > Hello.  Sorry if this has already been asked; I search the archives a
 > bit but could find anything relevant.
 > 
 > Although the command
 > 
 >    Plot[Exp[-10000 t^2],{t, 0, 1}, PlotRange -> All] 
 > 
 > produces exactly what I expect, the following one produces a plot
 > where the horizontal axis is from 0 to about 0.53 only:
 > 
 >    Plot[Exp[-10000 t^2],{t, 0, 1},PlotRange ->{-.5,1}]
 > 
 > I have $Version:
 > 
 >    Out[334]= 4.0 for Linux (July 22, 1999)
 > 
 > If this is normal, what am I missing?  In any case, how can display
 > with a prescribed horizontal range?
 > 
 > Thanks,
 > Alain
 > 
 > 
 > 
 > 



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