Re: Adding computed values to a Contourplot function
- To: mathgroup at smc.vnet.net
- Subject: [mg118587] Re: Adding computed values to a Contourplot function
- From: Heike Gramberg <heike.gramberg at gmail.com>
- Date: Tue, 3 May 2011 08:22:25 -0400 (EDT)
This should work:
Epilog -> {Text[
Framed[Style["b^2-4 a c =" <> ToString[b^2 - 4 a c],
FontSize -> 20]], {5, 5}]}
If you want a nicer formatting you could do something like
Epilog -> {Text[
Framed[Style[
ToString[StandardForm[HoldForm[b^2 - 4 a c]]] <> "=" <>
ToString[b^2 - 4 a c], FontSize -> 20]], {5, 5}]}
Heike
On 3 May 2011, at 10:43, 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}]}]
>
>
> I haven't found in the Mathematica 8 Documentation center a similar example.
>
> Thanks
>
> Sigismond Kmiecik
>