NEWS.md

In rcompanion: Functions to Support Extension Education Program Evaluation

rcompanion v 2.4.36 (2024-05-27)

• An option was added to the pairwiseNominalIndependence() function to allow for not using Yates' correction in 2 x 2 chi-square test.

rcompanion v 2.4.35 (2024-02-15)

• A fix was applied to the transformTukey() function to allow for samples sizes greater than 5000.

• A fix was applied to the cramerV() function to not round the value for the total sample size.

rcompanion v 2.4.34 (2023-09-15)

• A fix was applied to the cramerV() function to avoid an error in the case of certain sparse matrices.

• An update was made in the example for wilcoxonPairedR() to reflect the handling of paired samples in wilcox.test(). Specifically, this is in reference to PR 14359, the correction for which doesn't allow paired arguments for formula input for the t.test() and wilcox.test() functions.

• URLs in the documentation were updated to https where appropriate.

rcompanion v 2.4.30 (2023-05-03)

• Package documentation updated.

rcompanion v 2.4.26 (2023-04-03)

• MASS::rlm models were added to the accuracy() function.

• The ephronRSquared() function now accepts model objects.

• The accuracy(), ephronRSquared(), and nagelkerke() functions now accept glmmTMB model objects.

rcompanion v 2.4.21 (2023-01-16)

• Minor updates

rcompanion v 2.4.18 (2022-08-06)

• The wilcoxonOneSampleR() and wilcoxonPairedR() functions were modified to adjust the sample size for tied values.

• Two functions, mangiaficoD() and multiMangiaficoD() were added. These functions calculate the difference in medians for two groups divided by pooled median absolute deviation. This is somewhat analogous to a nonparametric version of Cohen's d.

rcompanion v 2.4.16 (2022-07-04)

• The pairwiseNominalIndependence() function was modified to include chi-square, G, and df values in the output.

rcompanion v 2.4.15 (2022-03-14)

• The scheirerRayHare() function was modified to include an option to use type-II sum-of-squares.

• The cliffDelta() function has been modified to better handle large sample sizes.

rcompanion v 2.4.13 (2022-01-03)

• The cateNelsonFixedY() function was added. This conducts a Cate-Nelson analysis on bivariate data where the critical Y value is fixed. This kind of analysis is useful in agronomy studies (for example, when a 95% yield is of interest), and for other bivariate data which don't conform well to linear, curvilinear, or plateau models.

• The cldList() function was revised so that it returns a data frame with the same letter for all groups when there are no significant differences, rather than stop and report "no differences".

• The accuracy() function was revised to include median absolute error.

• As a side note, all mentions of "sex" as demographic variables in the package were changed to "gender". The same change is being made on https://rcompanion.org/handbook/ .

rcompanion v 2.4.6 (2021-11-01)

• The efronRSquared() function was added. It produces Efron's pseudo R-squared from vectors of actual y values, residuals, and predicted values. It can also produce MAE, MAPE, MSE, RMSE, and CV. The accuracy() function also produces these statistics directly from a model object.

• The countRSquare() function was added. It produces the count pseudo r-squared for logistic regression or other models with a binary outcome. This statistic is the number of correctly predicted outcomes divided by the total number of outcomes.

• The oneSampleDominance() function was added. It produces a dominance statistic for the one sample case. It can be used as an effect size statistic for the one-sample sign test, and can be used with truly ordinal data.

• The pairedSampleDominance() function was added. This is similar to the oneSampleDominance() statistic, but used in the case of two-sample paired data.

• No longer suggests FSA package.

rcompanion v 2.4.1 (2021-05-01)

• The groupwiseMean() function was updated to allow for trimmed means, including determining confidence intervals by bootstrap, and to more formally handle NA values.

• The nominalSymmetryTest() function was improved.

• Documentation was updated for the groupwiseHuber() function.

rcompanion v 2.4.0 (2021-03-23)

• Two new functions were added that calculate effect sizes for the two-sample case, such as might be used with a Wilcoxon-Mann-Whitney test. These are wilcoxonPS(), that calculates Grissom and Kim's probability of superiority, and wilcoxonOR(), that calculates Agresti's generalized odds ratio.

• These functions complement others that could be used as effect size statistics in the two-sample case. vda() for Vargha and Delaney's A, cliffDelta() for Cliff's delta, wilcoxonRG() for Glass rank biserial correlation coefficient, and wilcoxonR() for the r statistic Z/sqrt(N).

rcompanion v 2.3.27 (2021-01-31)

• Minor bug fix in freemanTheta() function.

• Minor bug fixes, particularly with the groupwiseCMH() function to prevent an error in some cases.

rcompanion v 2.3.25 (2020-02-10)

• A function was added, quantileCI(), that calculates the confidence interval for the median of a numeric or ordered factor variable, based on a method included in Conover, Practical Nonparametric Statistics, 3rd.

rcompanion v 2.3.21 (2020-01-09)

• A function was added, blom(), which calculates normal scores transformation by Blom, van der Waerden, Tukey, and rankit methods, as well as z-score transformation, and rescaling to a specified range.

• A function was added, ordinalEtaSquared(), that calculates eta-squared as an effect size statistic, following a Kruskal-Wallis test, or for a table with one ordinal variable and one nominal variable; confidence intervals by bootstrap.

• A function was added, wilcoxonRG(), that calculates the Glass rank biserial correlation coefficient effect size for Mann-Whitney two-sample rank-sum test; confidence intervals by bootstrap.

• A function was added, wilcoxonPairedRC(), that calculates the paired-samples rank biserial correlation coefficient effect size for paired Wilcoxon signed-rank test; confidence intervals by bootstrap.

• A function was added, wilcoxonOneSampleRC(), that calculates the paired-samples rank biserial correlation coefficient effect size for one sample Wilcoxon signed-rank test; confidence intervals by bootstrap

• A modification was made to some effect size functions so that they will not fail when there are instances of the calculation of the statistic failing during the bootstrap procedure. In these cases, the confidence interval is reported as NA (the default) or as the confidence interval based on the successful calculations. (epsilonSquared(), vda(), cliffDelta(), wilcoxonR(), spearmanRho(), phi(), CramerV(), CramerVFit(), cohenW(), cohenG(), freemanTheta().

• A small modification was made to compareGLM() and compareLM() so that models with a long formula won't cause an error and the function to fail.

• The function multiVDA() was modified to include the Glass rank biserial correlation coefficient.

rcompanion v 2.3.0 (2019-08-27)

• The function phi() was added to calculate the effect size for a 2 x 2 table of counts, and to optionally produce a confidence interval.

• The function cohenW() was updated to optionally produce a confidence interval.

• The function wilcoxonZ() was added. It extracts the Z statistic from a two-sample, paired, and one-sample Wilcoxon tests.

• The wilcoxonR(), wilcoxonPairedR(), and wilcoxonOneSampleR() functions were updated to produce confidence intervals more quickly.

rcompanion v 2.2.2 (2019-07-27)

• Functions to calculate effect size statistics and confidence intervals were added, specifically for Kendall's w, Spearman's rho, Pearson's r, and Kendall's tau. The relevant functions are: kendallW() and spearmanRho().

rcompanion v 2.2.1 (2019-05-26)

• Functions to calculate some effect size statistics were updated.

rcompanion v 2.1.7 (2019-04-09)

• Confidence intervals by bootstrap for some effect size statistics were added, specifically for Cohen's g, odds ratio, Cohen's P. The relevant function is: cohenG().

• A function was added to calculate the maximum Vargha and Delaney's A or Cliff's delta as an effect size for Kruskal-Wallis test. multiVDA().

rcompanion v 2.1.7 (2019-03-02)

• Confidence intervals by bootstrap for some effect size statistics were added, specifically for Cliff's delta and Vargha and Delaney's A. The relevant functions are: vda() and cliffDelta().

rcompanion v 2.0.10 (2019-01-02)

• Confidence intervals by bootstrap for some effect size statistics were added, specifically for r for Wilcoxon tests, Cramer's V, epsilon-squared, and Freeman's theta. The relevant functions are: wilcoxonR(), wilcoxonPairedR(), wilcoxonOneSampleR(), epsilonSquared(), freemanTheta(), cramerV(), cramerVFit().

• The accuracy function was updated to include output for the coefficient of variation for models.

rcompanion v 2.0.3 (2018-11-01)

• Some functions were removed that conducted pairwise post-hoc tests where better methods exist: pairwiseSignTest(), pairwiseSignMatrix().

• The pairwiseMcnemar() function was updated to include statistics (chi-square, Z) in output.

• The transformTukey() function was modified to allow the user to suppress screen output, and an option was added to return the value of lambda rather than the transformed data.

• The nagelkerke() function was updated to allow the new lmerModLmerTest objects

rcompanion v 2.0.0 (2018-08-13)

• Some functions were removed that conducted pairwise post-hoc tests where better methods exist. Other functions were modified to decrease the number of imported packages. Removed functions are: nagelkerkeHermite(), pairwiseDifferences(), pairwiseOrdinalMatrix(), pairwiseOrdinalPairedMatrix(), pairwiseOrdinalPairedTest(), pairwiseOrdinalTest(), pairwiseRobustMatrix(), pairwiseRobustTest().

rcompanion v 1.14.0 (2018-05-29)

• Functions have been amended or added: multiVDA(), Calculates Vargha and Delaney's A and Cliff's delta pairwise across groups.

rcompanion v 1.13.0 (2018-03-25)

Functions have been amended or added:

• cohenG() - Calculates Cohen's g and odds ratio for paired contingency tables, such as those that might be analyzed with McNemar or McNemar-Bowker tests.
• cohenH() - Cohen's h is an effect size to compare two proportions.
• wilcoxonR() - Calculates r effect size for Mann-Whitney, two-sample rank-sum test, or a table with an ordinal variable and a nominal variable with two levels.
• wilcoxonOneSampleR() - Calculates r effect size for a Wilcoxon one-sample signed-rank test.
• wilcoxonPairedR() - Calculates r effect size for a Wilcoxon two-sample paired signed-rank test.
• cohenH() - function to calculate Cohen's h effect size for tables.

rcompanion v 1.12.3 (2018-02-25)

Functions added:

• wilcoxonR() - function to calculate r effect size for Wilcoxon Mann-Whitney rank sum test

• wilcoxonPairedR() - function to calculate r effect size for Wilcoxon signed rank test

• wilcoxonOneSampleR() - to calculate r effect size for one-sample Wilcoxon signed rank test

Minor improvements to: freemanTheta(), epsilsonSquared()

rcompanion v 1.11.3 (2018-02-19)

Improved cateNelson() and cramerV() functions.

rcompanion v 1.11.0 (2017-11-12)

• Added cramerVFit() for goodness of fit tests

rcompanion v 1.10.0 (2017-08-23)

• Added Efron's pseudo r-square to accuracy() function
• Added freemanTheta() function
• Added epsilonSquared() function

rcompanion v 1.9.1 (2017-07-24)

• Functions added to test percentiles. percentileTest() and pairwisePercentileTest() functions.

rcompanion v 1.8.0 (2017)

• scheirerRayHare() function added

rcompanion v 1.7.0 (2017)

• accuracy() function added for minimum maximum accuracy, MAPE, RMSE, and NRMSE

• cramerV() function added to calculate Cramer's V for correlation in tables of nominal variables (contingency tables)

rcompanion v 1.5.1 (2017-04-01)

• Fixed nobs problem in nagelkerke() and nakgelkeHermite() functions.

rcompanion v 1.5.0 (2017-01-31)

• Formula notation added for cldList()

rcompanion v 1.0.0 (2016-09-01)

This package provides custom functions for working through examples and analyses from "Summary and Analysis of Extension Education Program Evaluation in R" and "An R Companion for the Handbook of Biological Statistics".

There are several functions which provide summary statistics for grouped data. These function titles tend to start with groupwise". They provide means, medians, geometric means, and Huber M-estimators for groups, along with confidence intervals by traditional methods and bootstrap.

Function titles starting with pairwise" conduct pairwise tests among groups as a post-hoc analysis for omnibus tests. At the time of writing, these tests are Mood's median test, sign test (for Friedman test), permutation test, robust anova, and ordinal regression. The output is a table of comparisons and p-values, or a matrix of p-values that can be parsed into a compact letter display.

There are also functions that are useful for comparing models. accuracy(), compareLM(), compareGLM(), and pairwiseModelAnova(). These use goodness-of-fit measures like AIC, BIC, and BICc, or likelihood ratio tests, or accuracy measures like RMSE and Efron's pseudo r-square.

Functions for nominal data include post-hoc tests for Cochran-Mantel-Haenszel test (groupwiseCMH()), for McNemar--Bowker (pairwiseMcnemR()), and for tests of association like Chi-square, Fisher exact, and G-test (pairwiseNominalIndependence()).

A function close to my heart is cateNelson(), which performs Cate--Nelson analysis for bivariate data.

Examples and vignettes can be found at https://rcompanion.org/handbook/ and https://rcompanion.org/rcompanion/.

rcompanion documentation built on May 29, 2024, 8:42 a.m.