esvis (0.1.0)
Visualization and Estimation of Effect Sizes.
https://github.com/DJAnderson07/esvis
http://cran.rproject.org/web/packages/esvis
A variety of methods are provided to estimate and visualize distributional differences in terms of effect sizes. Particular emphasis is upon evaluating differences between two or more distributions across the entire scale, rather than at a single point (e.g., differences in means). For example, ProbabilityProbability (PP) plots display the difference between two or more distributions, matched by their empirical CDFs (see Ho and Reardon, 2012; ), allowing for examinations of where on the scale distributional differences are largest or smallest. The area under the PP curve (AUC) is an effectsize metric, corresponding to the probability that a randomly selected observation from the xaxis distribution will have a higher value than a randomly selected observation from the yaxis distribution. Binned effect size plots are also available, in which the distributions are split into bins (set by the user) and separate effect sizes (Cohen's d) are produced for each bin  again providing a means to evaluate the consistency (or lack thereof) of the difference between two or more distributions at different points on the scale. Evaluation of empirical CDFs is also provided, with builtin arguments for providing annotations to help evaluate distributional differences at specific points (e.g., semitransparent shading). All function take a consistent argument structure. Calculation of specific effect sizes is also possible. The following effect sizes are estimable: (a) Cohen's d, (b) Hedges' g, (c) percentage above a cut, (d) transformed (normalized) percentage above a cut, (e) area under the PP curve, and (f) the V statistic (see Ho, 2009; ), which essentially transforms the area under the curve to standard deviation units. By default, effect sizes are calculated for all possible pairwise comparisons, but a reference group (distribution) can be specified.
Maintainer:
Daniel Anderson
Author(s): Daniel Anderson [aut, cre]
License: MIT + file LICENSE
Released 3 months ago.
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