Welcome to Rtree Homepage
This is an updated version of a program that
analyzes relative risk and conducts sib pair linkage analysis using tree-based
methods. This program is free to use and distribute provided that
(a) I bear no responsibility as the consequence of using this program although I welcome collaborations of using my program for data analysis;
(b) the users must acknowledge the use of this RTREE program, and it is important to distinguish this RTREE program from any other commercial programs; and
(c) the users are recommended to cite the following references in their publications:
1.
H.P. Zhang and
B. Singer (1999) Recursive Partitioning in the Health Sciences. Springer.
2.
H.P. Zhang,
C.P. Tsai, C.Y. Yu, and G. Bonney (2001) Genetic Epidemiology, 21,
S317-322.
3.
H.P. Zhang and M. Bracken. (1995) Tree-based risk
factor analysis of preterm delivery and small-for-gestational-age birth. American
Journal of Epidemiology, 141:70--78.
4.
H.P. Zhang, T.
Holford, and M. Bracken. (1996) A tree-based method in prospective studies. Statistics
in Medicine, 15:37--50.
Thanks.
Heping Zhang (December 7, 2000)
Introduction
to the files in this directory:
·
rtree*: These are the executable codes compiled
on various systems. Save it as rtree and simply type rtree at your command line
or click in Windows systems and then follow the instruction.
The code was compiled using GCC on unix systems, VC++ 6.0 on Windows2000. If you have a system different from these, please send e-mails to
·
sample.dat: This is a sample data file for standard. The
first row indicates the type of covariates.
"d"
implies deleting that covariate from the analysis;
"o"
implies a continuous or an ordinal covariate;
"n"
implies a nominal covariate;
"r"
implies the outcome.
·
sample.inf:
The output file. The file can be read as follows:
Column 1: node
number. Node 1 is the root node.
Column 2: number of subjects in the node, e.g., 2418 subjects in node 2.
Column 3: left
daughter node, e.g. node 2 is the left daughter node of node 1.
Column 4: right
daughter node, e.g. node 3 is the right daughter node of node 1.
Column 5: The splitting variables. For example, variable 1 splits node 1.
Column 6: The
splitting value corresponds to the splitting variable.
·
sample.ps: A
postscript file for the final tree that can be viewed or printed.
·
1.ibd:
A sample IBD file.
·
locus.1: A sample locus file.
·
ped1:
A sample pedigree and marker file.
·
in1:
A sample file prepared for command--no_ibd--in RTREE.
Please report bugs or any comment to rtrees@masal.med.yale.edu Thank you!