Re: How to Eliminate
- To: mathgroup at smc.vnet.net
- Subject: [mg75062] Re: How to Eliminate
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Mon, 16 Apr 2007 04:09:03 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <evsr25$14h$1@smc.vnet.net>
JikaiRF at aol.com wrote:
> Dear Members:
> When I use "Solve" in order to solve polynomials with high orders, its
> solutions are usually reterned in terms of a pair of nested braces,
> like {{x -> 0.1}, {x -> 0.5}}. In this situation, I would like to
> obtain a pair of braces such as {0.1, 0.5}. In other words, I would
> like to know how to eliminate x ->.
> How can I obtain my result?
>
> Sincerely
> F. Takata.
The solution for x is returned as a transformation rule. You can use the
replacement operator /. to apply the rule. See [1] for detailed information.
In[1]:=
sols = {{x -> 0.1}, {x -> 0.5}}
Out[1]=
{{x -> 0.1}, {x -> 0.5}}
In[2]:=
vals = x /. sols
Out[2]=
{0.1, 0.5}
Regards,
Jean-Marc
[1] _The Mathematica Book_, "1.4.2 Values for Symbols",
http://documents.wolfram.com/mathematica/book/section-1.4.2