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Groups > comp.soft-sys.math.mathematica > #2090

Re: Adding computed values to a Contourplot function

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On May 3, 5:43 am, sigismond kmiecik <sigismond.kmie...@wanadoo.fr>
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}]}]
>
> I haven't found in the Mathematica 8 Documentation center a similar example.
>
> Thanks
>
> Sigismond Kmiecik

Yet another form is

Epilog -> {
  Text[Style[StringForm["b^2 - 4ac = ``", b^2 - 4 a c], 20], {5, 5}]
  }

or for a 2D formatted look

Epilog -> {
  Text[
    Style[
      StringForm["`1` = `2`", HoldForm[b^2 - 4 a c], b^2 - 4 a c], 20
      ], {5, 5}
    ]
  }

StringForm[<string with x = `` parameter slots>, x] is similar to
sprintf and other standard computing language formatted text output.

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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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