Re: How to use the result of Solve in Plot?
- To: mathgroup at smc.vnet.net
- Subject: [mg111667] Re: How to use the result of Solve in Plot?
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Mon, 9 Aug 2010 05:15:40 -0400 (EDT)
This works; however, the Solve is evaluated repeatedly
n = 0; Plot[y /.
Solve[{n++; 5*x + 4*y == 12}, y],
{x, 0, 2}]
n
78
Adding Evaluate results in a single evaluation of the Solve
n = 0; Plot[Evaluate[y /.
Solve[{n++; 5*x + 4*y == 12}, y]],
{x, 0, 2}]
n
1
So use
Plot[Evaluate[y /.
Solve[5*x + 4*y == 12, y]],
{x, 0, 2}]
Bob Hanlon
---- "Eduardo M. A. M.Mendes" <emammendes at gmail.com> wrote:
=============
Hello
I want to use the result of Solve[{5*x+4*y==12},{y}] in Plot[.,{x,0,2}].
Plot[Solve[.],{x,0,2}] does not work.
Many thanks
Ed
PS. I am new to Mathematica.