[R] Package ASSIST

[Chunlei Ke]

Dear R-list,

We have put together a package ASSIST, a collection of
R functions for fitting many spline-based
non-parametric/semi-parametric linear/non-linear
fixed/mixed models, including polynomial, periodic,
spherical, thin-plate splines and L splines as well as
smoothing spline ANOVA models. It also coveres some
cases of generalized additive models,  multiple index
models, varying coefficient models, functional linear
models, and self-modeling nonlinear regression models.


The package contains five main R functions:

1. ssr fits non-parametric regression models for 
independent and correlated Gaussian data, and for
independent binomial, Poisson and Gamma data; 

2. slm fits semi-parametric linear mixed-effects
models; 

3. nnr fits non-parametric nonlinear regression
models;

4. snr fits semi-parametric nonlinear regression
models; and
 
5. snm fits semi-parametric nonlinear mixed-effects
models. 

These extend such existing functions in R (S+) as
smooth.spline, gam, nls, lme and nlme.

ASSIST may be obtained at CRAN or

http://www.pstat.ucsb.edu/faculty/yuedong/software
 
Detail information about these functions and many
examples can be found in the manual of this package,
which again can be downloaded from the above site. 

Comments and suggestions are highly appreciated!

Great thanks!

Yuedong Wang 
and Chunlei Ke
 

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