Block, Randomly Assign, and Diagnose Potential Interference in Randomized Experiments

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Description

Block units into experimental blocks, with one unit per treatment condition, by creating a measure of multivariate distance between all possible pairs of units. Maximum, minimum, or an allowable range of differences between units on one variable can be set. Randomly assign units to treatment conditions. Diagnose potential interference problems between units assigned to different treatment conditions. Write outputs to .tex and .csv files.

Details

Package: blockTools
Type: Package
Version: 0.6-3
Date: 2016-12-02
License: GPL (>=2)

Given raw data, block creates experimental blocks, assignment assigns units to treatment conditions, diagnose detects possible interference problems, and outTeX and outCSV write block or assignment output objects to a set of .tex and .csv files, respectively. In sequential experiments, seqblock assigns units to treatment conditions.

Author(s)

Ryan T. Moore rtm@american.edu and Keith Schnakenberg keith.schnakenberg@gmail.com

Maintainer: Ryan T. Moore rtm@american.edu

References

http://www.ryantmoore.org/html/software.blockTools.html

Examples

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data(x100)

## block
out <- block(x100, groups = "g", n.tr = 2, id.vars = c("id"), block.vars
             = c("b1", "b2"), algorithm="optGreedy", distance =
             "mahalanobis", level.two = FALSE, valid.var = "b1",
             valid.range = c(0,500), verbose = TRUE)
## assign
assg <- assignment(out, seed = 123)
## diagnose
diag <- diagnose(object = assg, data = x100, id.vars = "id",
                suspect.var = "b2", suspect.range = c(0,50))
## create .tex files of assigned blocks
outTeX(assg)
## create .csv files of unassigned blocks
outCSV(out)
## create block IDs
createBlockIDs(out, x100, id.var = "id")
## block ID integers are unique, even with several groups
axb <- assg2xBalance(assg, x100, id.var = "id", bal.vars = c("b1", "b2"))