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Re: Draw two functions in a graph, one of them does also have a parameter.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90214] Re: Draw two functions in a graph, one of them does also have a parameter.
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Wed, 2 Jul 2008 05:32:12 -0400 (EDT)

On 7/1/08 at 7:01 AM, vexie.infamous at googlemail.com (Felipe
Mannshardt) wrote:

>Is there a way to do a Plot do draw this two functions in the same
>graph ? I am asking because i am having problems due the
>parameter "a".

>I have,

>f(x)= -x^2 + 6x g(x)= ax

It is definitely preferable to post Mathematica code here

>i want to draw them in the same graphic and with a from 0 to 3 . . .

>Can not think of a way of doing this, due the "a" parameter . . .

>Plot[{f[x],[g[a][x]},{x,0,7},{a,0,3}]

Here are two ways of getting a combined plot.

=46irst, you could plot a family of curves for discrete values of
a. For example

f = -x^2  + 6 x;
g = a x;
Plot[Evaluate[Join[{f}, Table[g, {a, 0, 3}]]], {x, 0, 7}]

alternatively, you could show an area for g and a curve for f.
=46or example,

Show[Plot[f, {x, 0, 7}],
  Plot[g /. a -> 3, {x, 0, 7}, Filling -> Bottom], PlotRange -> All]

Basically, you need to define the a parameter and decide what it
is you want to show.


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