The new version of spdep on CRAN (0.3-5) depends on the SparseM package,
using its sparse determinant functions for fitting SAR models. This means
that users risk update.packages() failing if SparseM version >= 0.54 is
not installed first. This version provides robust sparse determinants, and
thus makes it possible to retire the previous sparse matrix code, which
has an unsolved memory bug - it will be retired at the next release.
This release also introduces the optional use of optim() rather than line
search using optimize(), which has worked without problem for some
BLAS/compiler combinations, but with problems for others. Use of optim()
will become necessary when trying to fit more than one spatial
coefficient, which is not yet possible.
Please report bugs/difficulties associated with migration to this new
series of spdep. The Windows binary should appear before long.
For users needing previous versions, for source see:
Since recent spdep versions have depended on R 2.0, knowing that you can
access older Windows binaries in the last/ folder is helpful for those who
cannot easily upgrade their R installation.
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no
Department of Economics
Norwegian School of Economics
N-5045 Bergen, Norway