Re: Extracting all the variables from a list of equations?
- To: mathgroup at smc.vnet.net
- Subject: [mg25507] Re: [mg25482] Extracting all the variables from a list of equations?
- From: Tomas Garza <tgarza01 at prodigy.net.mx>
- Date: Thu, 5 Oct 2000 23:50:25 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
In[1]:=
Cases[v, x_ /; Head[x] == Symbol, {2}] // Union
Out[1]=
{v$233Period, v$234Period, v$235Period, v$236Period}
Tomas Garza
Mexico City
"Ryan VanRiper (--)" <ravanrip at yahoo.com> wrote:
> How would i go about extracting all the variables from a list of
> inequalities?
>
> If i had.. V = {v$233Period > 0, v$234Period == v$233Period,
> v$236Period <= v$235Period}
>
> I would like to get a list that looks like the following..
>
> X = {v$233Period, v$234Period, v$233Period, v$236Period,
v$235Period}
>
> Then find all the unique elements to give an answer..
>
> Y = {v$233Period, v$234Period, v$236Period, v$235Period}