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MathGroup Archive 2004

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Re: stupid text formatting question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg45456] Re: [mg45451] stupid text formatting question
  • From: Tomas Garza <tgarza01 at prodigy.net.mx>
  • Date: Thu, 8 Jan 2004 01:17:30 -0500 (EST)
  • References: <200401072231.RAA10379@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Do you have a typo in your message?  The second line in the definition of
errors should read myestimatederror31? If that is the case, I suggest the
following (leaving aside the embellishments):

In[46]:=
errs01 = Transpose[{-(Transpose[p01data][[2]] -
       myestimatederror01), Transpose[p01data][[2]] -
      myestimatederror01}];

In[44]:=
errs31 = Transpose[{-(Transpose[p31data][[2]] -
       myestimatederror31), Transpose[p31data][[2]] -
      myestimatederror31}];

In[45]:=
MultipleListPlot[MapThread[List,
    {p01data, ErrorBar /@ errs}],
   MapThread[List, {p31data, ErrorBar /@ errs}]];

There is an overlapping of the error bars, but that is a problem with your
data: the errors associated with p31 are too large.

Tomas Garza
Mexico City
----- Original Message ----- 
From: "Nathan Moore" <nmoore at physics.umn.edu>
To: mathgroup at smc.vnet.net
Subject: [mg45456] [mg45451] stupid text formatting question


> Suppose I have a set of data,
>
> data= {{0.25, 54, 5, 62}, {0.35, 2878, 354, 3394}, {0.45, 21089, 3824,
27160}, {0.55, 59194, 12313, 79863}};
>
> that I split up into vectors,
>
> a1 = Transpose[data][[1]];
> a2 = Transpose[data][[2]];
> a3 = Transpose[data][[3]];
> a4 = Transpose[data][[4]];
> p01data = Select[Transpose[{a1, a2/a4}], #[[2]] > 0 &];
> p31data = Select[Transpose[{a1, a3/a4}], #[[2]] > 0 &];
>
> that I want to plot with the command,
>
> Show[
> MultipleListPlot[p01data, DisplayFunction->Identity,
> SymbolShape->{PlotSymbol[Box,Filled->False]}],
> MultipleListPlot[p31data, DisplayFunction->Identity,
> SymbolShape->{PlotSymbol[Triangle,Filled->False]}],
> PlotRange->All,Frame->True,Axes->False,
> DisplayFunction->$DisplayFunction
> ]
>
> All of this works.  I wish to include an estimated Poisson Error, given in
column format,
>
> myestimatederror01=Sqrt[a2]/a4;
> myestimatederror01=Sqrt[a3]/a4;
>
> I know that the ErrorBar command is used to include this error bar in the
style of:
> {{x,y},ErrorBar[error]}, but I can't get the command which would do this
to a vector to work properly.
>
> I think the following should work, It doesn't - what should I use instead?
>
> p01data = Select[Transpose[{{a1, a2/a4},ErrorBar[Sqrt[a2]/a4] }], #[[2]] >
0 &];
> p31data = Select[Transpose[{{a1, a3/a4},ErrorBar[Sqrt[a3]/a4] }], #[[2]] >
0 &];
>
> Nathan Moore
>
>



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