Felix Schönbrodt

PD Dr. Dipl.-Psych.

R-package: Wilcox’ Robust Statistics updated (WRS v0.20)

Rand Wilcox constantly updates the functions accompanying his books on robust statistics. Recently, they have been updated to version 20. The functions are available in the WRS package for R – for installation simply type
install.packages("WRS", repos="http://R-Forge.R-project.org", type="source")

Update: For installation of the WRS package, please use only the fail-safe installation procedure described here!

In version 0.20, a number of functions dealing with ANCOVA have been added and some others improved. Unfortunately, only very few help files exist for the functions. I would recommend to check out the source code, as most functions have a comment section roughly explaining the parameters. Alternatively, consult Wilcox’ books for descriptions of the functions.

Wilcox, R. R. (2012). Introduction to Robust Estimation and Hypothesis Testing, 3rd Ed. Academic Press.
Wilcox, R. (2012). Modern Statistics for the Social and Behavioral Sciences: A Practical Introduction. CRC Press.
Wilcox, R. R. (2010). Fundamentals of Modern Statistical Methods: Substantially Improving Power and Accuracy. Springer, 2nd Ed.
Wilcox, R. R. (2009). Basics Statistics: Understanding Conventional Methods and Modern Insights. New York: Oxford.

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6 Responses to “R-package: Wilcox’ Robust Statistics updated (WRS v0.20)”

  1. Ben says:


    I wanted to install the WRS package from Rand Wilcox. When I entered the command line, I got the following response. Is this package no longer available?

    > install.packages(“WRS”,repos=”http://R-Forge.R-project.org”)
    Installing package into ‘C:/Documents/R/win-library/3.0’
    (as ‘lib’ is unspecified)
    Warning: unable to access index for repository http://R-Forge.R-project.org/bin/windows/contrib/3.0
    Warning message:
    package ‘WRS’ is not available (for R version 3.0.1)

    Thanks in advance!

  2. Stefan Th. Gries says:

    I have the same problem and, yes, I have tried the installation procedure.

    • FelixS says:

      Usually it works now. Could you post your sessionInfo() from R, and your OS?

      • Stefan Th. Gries says:

        So I just upgraded from Mint 15 to Kubuntu 13.1064bit but it still doesn’t work properly. With regard to the suggested packages, I get all but parallel:

        package ‘parallel’ is not available (for R version 3.0.1)

        and the same as before for WRS:

        package ‘WRS’ is not available (for R version 3.0.1)

        > sessionInfo()
        R version 3.0.1 (2013-05-16)
        Platform: x86_64-pc-linux-gnu (64-bit)

        [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
        [3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
        [7] LC_PAPER=C LC_NAME=C

        attached base packages:
        [1] stats graphics grDevices utils datasets methods base

        other attached packages:
        [1] devtools_1.3

        loaded via a namespace (and not attached):
        [1] digest_0.6.3 evaluate_0.5.1 httr_0.2 memoise_0.1 parallel_3.0.1
        [6] RCurl_1.95-4.1 stringr_0.6.2 tcltk_3.0.1 tools_3.0.1 whisker_0.3-2

        Not sure what happens here, it all used to work fine before …

  3. An outstanding share! I have just forwarded this onto a coworker who was doing a little research on this.

    And he actually bought me lunch simply because I discovered it for him…
    lol. So let me reword this…. Thanks for the meal!!
    But yeah, thanks for spending some time to talk about this subject here on your website.

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