TridiagonalSolve gone?
- To: mathgroup at smc.vnet.net
- Subject: [mg20337] TridiagonalSolve gone?
- From: psalzman at landau.ucdavis.edu
- Date: Fri, 15 Oct 1999 20:20:56 -0400
- Sender: owner-wri-mathgroup at wolfram.com
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