Re: TridiagonalSolve gone?
- To: mathgroup at smc.vnet.net
- Subject: [mg20349] Re: TridiagonalSolve gone?
- From: "Kevin J. McCann" <kevin.mccann at jhuapl.edu>
- Date: Sat, 16 Oct 1999 00:47:40 -0400
- Organization: Johns Hopkins University Applied Physics Lab, Laurel, MD, USA
- References: <7u7tcp$p65@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Check out AddOns->StandardPackages->LinearAlgebra->Tridiagonal. -- Kevin J. McCann Johns Hopkins University APL <psalzman at landau.ucdavis.edu> wrote in message news:7u7tcp$p65 at smc.vnet.net... > i'd like to use TridiagonalSolve[]. it doesn't seem to be working. > > TridiagonalSolve[a,b,c,d] > > returns > > TridiagonalSolve[a,b,c,d] > > with a, b, c and d expanded as lists. so i went to the help browser and > looked up TridiagonalSolve. it gave a short example which i copied and > pasted into a notebook. everything went fine until the very last line: > > TridiagonalSolve[a, b, c, {2, 3, 4, 5}] > > which according to the help browser should have a value > > \!\({\(-\(28\/9\)\), 26\/9, 5\/27, 20\/81}\) > > but instead, in my notebook it returned: > > TridiagonalSolve[{7, 1, 11}, {4, 8, 2, 12}, {5, 9, 3}, {2, 3, 4, 5}] > > and i did make sure to <<LinearAlgebra`Tridiagonal`. any thoughts as to > why this function isn't working? > > pete > > >