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MathGroup Archive 2006

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Re: Defining Solve results as variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg70059] Re: Defining Solve results as variable
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Sun, 1 Oct 2006 04:10:34 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <eflebs$deg$1@smc.vnet.net>

Diana wrote:
> Hi,
> 
> I am trying to write a program which defines a variable with the
> results of a Solve equation.
> 
> So, if I write
> 
> Solve[x+1=2,x]
> 
> I get {{x -> 1}}
> 
> I have not been able to figure out how to define a variable to the
> result, so that if I then type
> 
> x1 = %, for example, it defines x1 as 1.
> 
> I know this must be simple, but I didn't find it in the Help material.
> 
> Thanks in advance,
> 
> Diana
> 
Hi Diana,

In[1]:=
sols = Solve[x + 1 == 2, x]

Out[1]=
{{x -> 1}}

In[2]:=
x1 = x /. sols[[1]]

Out[2]=
1

Have a look at the following links:

http://documents.wolfram.com/mathematica/book/section-1.4.2
http://documents.wolfram.com/mathematica/book/section-1.5.7

Regards,
Jean-Marc


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