Re: How can draw Focus(Points)
- To: mathgroup at smc.vnet.net
- Subject: [mg17082] Re: [mg17139] How can draw Focus(Points)
- From: "Tomas Garza" <tgarza at mail.internet.com.mx>
- Date: Fri, 23 Apr 1999 02:32:16 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Clara [cnoemia at ccg.uc.pt] wrote:
> I am beginner in Mathematica. I have created the parabola using:
> Plot1= Plot[ {y = 1/2x^2, y = -4}, {x, -4, 4},
> AxesLabel -> {"xx","yy"}
> , PlotStyle -> Hue[160/255],
> AxesStyle -> Hue [160/255] ]
>
> Now I want put the focus (point) in graphics. How can I do? Please help
> me.
Hello, Clara!
Use Epilog:
Plot1= Plot[ {y = 1/2x^2, y = -4}, {x, -4, 4},
AxesLabel -> {"xx","yy"}
, PlotStyle -> Hue[160/255],
AxesStyle -> Hue [160/255] ,
Epilog->{PointSize[0.025],Hue[0.9],Point[{0,1/2}]}]
Good luck,
Tomas Garza
Mexico City