Re: Plotting/Inflection Point
- To: mathgroup at smc.vnet.net
- Subject: [mg26002] Re: Plotting/Inflection Point
- From: "A. E. Siegman" <siegman at stanford.edu>
- Date: Wed, 15 Nov 2000 02:09:50 -0500 (EST)
- Organization: Stanford University
- References: <8ur0e1$qta@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <8ur0e1$qta at smc.vnet.net>, bobmarley4u2c at my-deja.com wrote:
> If I have a polynonial: f(x)=2x^3-3x^2-12, and I found that the
> Inflection Point is: (.5,-6.5). I want to plot the function and, show
> where the inflection point is by labeling it on the plot. How can I do
> that?
Assuming you know the coordinates of the point you want to mark,
something like:
Show[Plot[x^2, {x, 0, 1}, DisplayFunction -> Identity],
Graphics[{PointSize[0.02], Point[{1/2, 1/4}]}],
DisplayFunction -> $DisplayFunction]
will put a larger dot on the selected point. (You can of course write
the Plot and Graphics statements as separated named expressions, then
put the names into Show.)
To put a text label near this point, read about (or bring up the Help
message) for
Text[expr, coords, offset]
which will easily do the job.