Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2012

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: recursively solve equation and save the values only

  • To: mathgroup at smc.vnet.net
  • Subject: [mg125810] Re: recursively solve equation and save the values only
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Tue, 3 Apr 2012 04:50:23 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201204020827.EAA04300@smc.vnet.net>
  • Reply-to: murray at math.umass.edu

What is the equation you're trying to solve? I don't see one there.

On 4/2/12 4:27 AM, wyn smjy wrote:
> Dear All,
>
> I am new to Mathematica. I am trying to recursively solve equation and
> saving the values into Table. Since I need the real solutions only so
> I use Reduce.
>
> The following is my code:
>
> f = 5.68672 T + 6.46776 T^3
>
> t = Table[i, {i, 0.2, 3, 0.2}]
>
> sols = Table[Reduce[f == t[[i]], T, Reals], {i, Length[t]}] {T ==
> 0.0351204, T == 0.06995, T == 0.104221, T == 0.137708, T == 0.170237,
> T == 0.201687, T == 0.231988, T == 0.26111, T == 0.289058, T ==
> 0.315857, T == 0.34155, T == 0.366188, T == 0.389828, T == 0.412529, T
> == 0.434347}
>
> The solution is OK as I compared it to other software as well. The
> only thing that matters me is how to remove the T== , i.e. I just need
> the solution and then to copy this into another table, say sols2 that
> contains
>
> sols2 = {0.0351204, 0.06995, 0.104221, T == 0.137708,.., 0.434347}
>
> I tried the following: sols2 = T/.sols but produce the following
> error:
>
> sols2 = ReplaceAll::reps: ... is neither a list of replacement rules
> nor a valid dispatch table, and so cannot be used for replacing.>>
>
> Does anyone know how to remove the T==?
>
> Thank you,
>
> Wayan
>

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305



  • Prev by Date: Re: typesetting derivative at a value
  • Next by Date: Re:recursively solve equation and save the values only
  • Previous by thread: recursively solve equation and save the values only
  • Next by thread: Re:recursively solve equation and save the values only