About RGA Utils
This started as a collection of small snippets of R code that I kept
copying from project to project. Much of it started life in one of
the packages that eventually went
into CPTtools, but I thought it might be
useful beyond that.
Then I started getting interested in the use
of Al Beaton's sweep
operator in missing data problems. I found that the Beaton's sweep
operator (different from the built-in R/S
was not readily available in any R package. I started building that
and other matrix operators found in Dempster's
1969 book on multivariate statistics. (I found a couple of
typographical errors in some of the examples, which are fully
re-created in the examples distributed with the package).
I also noticed that
although JAGS had a
categorcial distribution, R did not have one built-in. So I added
that to this collection as well.
This package is a loose collection of hopefully useful functions.
Here are some key functions that can be used as a starting point for
exploring the package:
- This performs a regression restricted by
a Q-matrix, a logical matrix indicating which coefficients
should be non-zero. It handles weights and missing data.
- This provides
dcat functions for nominal categorical data as
docat, pocat, qocat and
functions for ordered categorical data. It also provides
median.ordered method for ordered factors.
- This produces an array of colors that
differ by staturation or saturation and value, and not by hue.
This is good for producing graphs that both look good in color and
retain their legibility when printed in grayscale.
- This is a serialization function for R
- This is Al Beaton's sweep operator, which
regresses out variables in a normal distribution. It also provides
an interative method for inverting a matrix.
- This separates numeric and non-numeric
columns in a data frame.
- This produces a matrix of sums and sums of squares
from weighted data.
RGAUtils Talks and Papers
Here are slide for the presentation I gave
at the Florida Educational Research Assoication conference in 2016.
RGAutils License Information
RGAutils is made available under
License, version 2.0.
Current Version Status
The current version (0.1-4) is mostly debugged and documentation
Also included in the new version are R datasets corresponding
The following releases are archived here:
Currenty, all of the code is written in pure R, so the source code
version should install cleanly on all systems. (If installing from
the R menus, you need to select "Install source package...")
The latest development version is available as a subversion repository
If you have patches or other correspondence about RGAutils you can
contact me at email@example.com. If
you are filing a bug report, please be sure to include:
- The version number of CPTtools and R that you are using.
- Your operating system and whether it is 64 or 32 bit.
- The exact text of any error message that is generated.
- A small script that reproduces the problem (if at all possible).
Beaton, A. E. (1964). The Use of Special
Matrix Operators in Statistical Calculus.
Educational Testing Service
Research Report RB-64-51.
Dempsters, A. P. (1969). Elements of
Continuous Multivariate Analysis. Addison-Wesley.
The software is offered AS IS, without any warranty of any kind.
Support is provided on a volunteer basis, and may not be immediately
Site last updated on 2016-11-03.