Groups > comp.soft-sys.math.mathematica > #2097

Re: Adding computed values to a Contourplot function

From	Helen Read <readhpr@gmail.com>
Newsgroups	comp.soft-sys.math.mathematica
Subject	Re: Adding computed values to a Contourplot function
Date	2011-05-04 10:31 +0000
Organization	Steven M. Christensen and Associates, Inc and MathTensor, Inc.
Message-ID	<ipr9us$pn$1@smc.vnet.net> (permalink)
References	<ipoioe$g1h$1@smc.vnet.net>

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On 5/3/2011 5:43 AM, sigismond kmiecik wrote:
> Hello to everybody
>
> How can I modify the code below (after Epilog) in order to add after
> "b^2-4ac=" its computed value and have everyhing framed?
>
>
> a=0.5;b=1;c=6;d=2;e=3;f=-30;
> ContourPlot[{a x^2  +b x*y + c  y^2  + d x  + e y - 30 == 0 }, {x, -12,
> 10}, {y, -8, 8
> }, ContourStyle->  {Red, Thick}, Axes ->  True, AxesLabel->  {x,y} ,
> Frame->  False,ImageSize->  {550,400}, Epilog->{Text[Style["b^2 -
> 4ac=",FontSize->  20],{5,5}]}]

Row is useful for mixing strings and expressions.


a = 0.5; b = 1; c = 6; d = 2; e = 3; f = -30;
ContourPlot[{a x^2 + b x*y + c y^2 + d x + e y - 30 == 0}, {x, -12,
   10}, {y, -8, 8}, ContourStyle -> {Red, Thick}, Axes -> True,
  AxesLabel -> {x, y}, Frame -> False, ImageSize -> {550, 400},
  Epilog -> {Text[
     Style[Framed[Row[{"b^2 - 4ac=", b^2 - 4 a c}]],
      FontSize -> 20], {5, 5}]}]


-- 
Helen Read
University of Vermont

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Thread

Adding computed values to a Contourplot function sigismond kmiecik <sigismond.kmiecik@wanadoo.fr> - 2011-05-03 09:43 +0000
  Re: Adding computed values to a Contourplot function Peter Breitfeld <phbrf@t-online.de> - 2011-05-03 12:23 +0000
  Re: Adding computed values to a Contourplot function Dan <dflatin@rcn.com> - 2011-05-04 10:35 +0000
  Re: Adding computed values to a Contourplot function Helen Read <readhpr@gmail.com> - 2011-05-04 10:31 +0000

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