Stable version:
The RItools package implements useful functions for
implementing randomization inference based statistical tests. The
package provides tools for testing balance of observed covariates in
observational studies using the methodology of:
Ben B. Hansen and Jake Bowers (2008). Covariate balance in simple,
stratified and clustered comparative studies. Statistical Science.
23(2):219--236.See the online documentation for xBalance for more
details.
The package also provides outcome analysis of simple or block
randomized trials (or matched observational studies) based on user
defined models and test statistics. See the online documentation of
parameterizedRandomizationDistribution for more
details.
RItools is available on CRAN:
> install.packages("RItools")
> library("RItools")These directions will install development version in a way that will
not overwrite an existing installation of RItools from
CRAN. You will will need to know the name of the branch you wish to
install.
master: The current released version of
RItools and a holding place for small bug changes.randomization-distribution: Experimental work on
outcome analysis using user defined models of effects and test
statistics. This branch contains the tools necessary to compute
estimated treatment effects, p-values, and confidence intervals
(regions) using direct simulation from the randomization distribution
implied by the design of the experiment (or using the exact
randomization distribution if the number of possible ways for the
treatment to be assigned is relatively small).We recommend using dev_mode from the
devtools package to install in-development versions of the
package so that you can keep the current CRAN version as the primary
package. Activating dev_mode creates a secondary library of
packages which can only be accessed while in dev_mode.
Packages normally installed can still be used, but if different versions
are installed normally and in dev_mode, the
dev_mode version takes precedent if in
dev_mode.
Install and load the devtools package:
> install.packages("devtools")
> library("devtools")Activate dev_mode:
> dev_mode()
d>Note that the prompt changes from > to
d> to let you know you’re in dev_mode. Now
choose the development branch you want to use. To install
master:
d> install_github("markmfredrickson/RItools")or to install the randomization-distribution branch:
d> install_github("markmfredrickson/RItools@randomization-distribution")Either way, the package is then loaded in the usual fashion, provided
you’re still in dev_mode:
d> library(RItools)Once you’ve done this you can disable dev_mode as
follows
d> dev_mode()
>The development version of the package remains loaded.
Note that if you load the package – ie, enter
library(RItools) (when the package hasn’t already been
loaded otherwise) – while not in dev_mode, then
you’ll get whatever version of the package may be installed in your
library tree, not this development version.
If you want to switch between versions of RItools, we
suggest re-starting R.