Functions, methods, and datasets for fitting dimension
reduction regression, including pHd and inverse regression methods
SIR and SAVE.  These methods are described, for example, in
R. D. Cook (1998), Regression Graphics, Wiley, New York.  Also included is
code for computing permutation tests of dimension.  Adding additional
methods of estimating dimension is straightforward.  One function depends
on the lqs package.  Minor revision to be compatible with R 1.7.

Functions, methods, and datasets for fitting dimension
reduction regression, including pHd and inverse regression methods
SIR and SAVE.  These methods are described, for example, in
R. D. Cook (1998), Regression Graphics, Wiley, New York.  Also included is
code for computing permutation tests of dimension.  Adding additional
methods of estimating dimension is straightforward.  One function depends
on the lqs package.

Functions, methods, and datasets for fitting dimension
reduction regression, including pHd and inverse regression methods
SIR and SAVE.  These methods are described, for example, in
R. D. Cook (1998), Regression Graphics, Wiley, New York.  Also included is
code for computing permutation tests of dimension.  Adding additional
methods of estimating dimension is straightforward.  One function depends
on the lqs package.  Minor revision to be compatible with R 2.0.0, and
bug-fixes.  For documentation, see
http://www.jstatsoft.org/v07/i01/drdoc.pdf.

Methods for Dimension Reduction for Regression
Functions, methods, and datasets for fitting dimension
reduction regression, using slicing (methods SAVE and SIR), Principal
Hessian Directions (phd, using residuals and the response), and an
iterative IRE.  Partial methods, that condition on categorical
predictors are also available.  A variety of tests, and stepwise
deletion of predictors, is also included.  Also included is
code for computing permutation tests of dimension.  Adding additional
methods of estimating dimension is straightforward.
For documentation, see the vignette in the package.   With version 3.0.4,
the arguments for dr.step have been modified.