tadaatoolbox 0.17.0

• Ensure compatibility with broom 0.7.0 (#32)
• Remove tadaa_pairwise_gh.
• Update infrastructure using usethis::use_tidy_ci(), bumps R dependency to >= 3.2.
• Add z.test() to fill the niche in stats. Useful to verify hand-made calculations done in educational contexts, as I assume nobody else will ever need a z-test function.
• Add tadaa_z.test() while we’re at it.

Fixing mistakes

• Remove internal Levene-test from tadaa_t.test(), defaulting to var.equal = FALSE as stats::t.test() does. Turns out this was a pretty bad idea due to the multiplicity problem, and the Welch-test is good enough.
• Remove the post-hoc / empirical power from
  • tadaa_t.test()
  • tadaa_aov()
  • tadaa_one_sample()
• Remove tadaa_normtest(). It never should have been a thing in the first place.

tadaatoolbox 0.16.1

• Add inv() for inverting Likert-scales
• Make pval_string() conform to APA guidelines (no more leading zeros)
• More accurate R dependency (R >= 2.10) (i.e. more inclusive)
• Add a bunch more tests

tadaatoolbox 0.16.0

Fixes & Features

• Add ord_pairs to retrieve \(N_c\), \(N_d\), ties and total number of pairs for contingency tables. Internals for this function are straight up copied from this gist.
• Add etasq in case you want to show students what \(\eta^2\) is without having to explain ANOVA.
• Fix ord_somers_d not returning the correct value for symmetric = TRUE
• Removed drop_labels because sjlabelled::zap_labels is a thing

Internals

• Eliminate ryouready dependency, in favor of the more versatile DescTools package:
  • nom_lambda: Use DescTools::Lambda
  • ord_gamma: Use DescTools::GoodmanKruskalGamma
  • ord_somers_d: Use DescTools::SomersDelta
• Eliminate vcd dependency, also in favor of DescTools.
• (The DescTools functions are very similar to what the wrappers do, so the wrappers might be removed in the future.)
• Eliminate lazyeval dependency in tadaa_int by being better at ggplot2.
• Eliminate dplyr dependency by being better at R.
• Eliminate haven dependency by not re-exporting as_factor anymore ¯\_(ツ)_/¯
• Eliminate sjmisc depencency because why did we depend on that again?
• Eliminate sjlabelled dependency (only used for re-exports).
• Eliminate lsr dependency in favor of, you guessed it, DescTools for eta in tadaa_aov.

tadaatoolbox 0.15.0

• Fix error in SEM calculation in tadaa_one_sample for t-tests
• Make sure tadaa_-test functions use tadaatoolbox::pval_string instead of the pixiedust version
• Remove recoded leist var from ngo, as it should be computed from leistung by students.
• Move cowplot from Imports to Suggests because we only need it in one function, sometimes.
• More compact table output in tadaa_nom and tadaa_ord.

Removals

• [tadaa_]likertize is removed. Use sjmisc::split_var.
• labels_to_factor is removed because various as_factors exist.

tadaatoolbox 0.14.0

• Silence warnings in functions using chisq.test
• Add ord_tau to calculate all the Taus
  • Append them on tadaa_ord

tadaatoolbox 0.13.0

New Features

• Add tadaa_chisq for a \(\chi^2\)-Test with OR and effect size.

Under the Hood

• Switched from sjmisc to the new sjlabelled (Thanks, @strengejacke!)
• Also re-export magrittr::%$% because it’s really handy sometimes.
• Fix #30: Undocumented arguments in tadaa_one_sample

tadaatoolbox 0.12.0

New Features

• Add tadaa_pairwise_t as an extension of stats::pairwise.t.test that works with two grouping factors and thereby can test interactions.
  • Also knows the Sidak method for p-adjustment, both regular and step-down procedures.
  • See this and that
• Add tadaa_pairwise_gh for the Games Howell post-hoc procedure as an alternative to TukeyHSD.
  • Adapted from this gist by GitHub user aschleg
  • Further reading
• Add tadaa_pairwise_tukey while we’re at it. Just a thin wrapper for stats::TukeyHSD but with tidied output and usage consistent with the previous tadaa_pairwise_* functions.
• Add tadaa_plot_tukey to plot Tukey HSD results as error bars because boy do I like error bars.
• Add tadaa_balance as a replacement for tadaa_heatmap to check equality of group sizes.
• Re-exports:
  • %>% from magrittr as all the cool kids to these days.
  • %<>% from magrittr because I happen to really like it.
  • [sg]et_label[s]and word_wrap from sjmisc, as they’re handy.
  • as_factor from haven as a replacement for the deprecated labels_to_factor.

Tweaks, Patches & Bug Fixes

• theme_tadaa:
  • Is now an alias for theme_readthedown, will probably become the new canonical version.
  • Now finally adds vertical space to the x axis title via proper margining.
• tadaa_aov:
  • Default type is now 3, for generally safer results and consistency with SPSS.
  • Added check_contrasts option for type = 3 sums of squares, which ensures each non-ordered factor has contr.sum contrasts
  • Now auto-factorizes independent variables by default, fixes #24.
  • Now imports methods, which should fix an issue during knitr or rmarkdown processing where the function is couldn’t be found. If not, manually library(methods) as a workaround.
  • Fix wrong sprinkle labelling causing eta.sq to be formatted like a p-value.
  • Added show_power argument to calculate power via pwr::pwr.f2.test.
    • Requires more testing against software like G*power to ensure accuracy.
• tadaa_t.test:
  • Internal Levene test now uses center = "median" for more robust results, as it should.
    • Now also uses \(\alpha = 0.05\) instead of \(\alpha = 0.1\).
    • Use new argument var.equal to override internal Levene test.
  • Power should now be properly reported for alternative = "less" or greater.
  • Added conf.level argument used for CI and power calculations
  • effect_size_t:
    • Now doesn’t return the absolute effect size by default.
    • Added paired argument so effects for paired tests are now a thing.
• tadaa_wilcoxon:
  • Also fix direction argument not being honored.
• tadaa_int:
  • Gains print (logical) argument to suppress printing if so desired. The output will still be returned invisibly.
• tadaa_one_sample: Should make sense now.
• Remove na.rm argument from tadaa_t.test and tadaa_wilcoxon because it’s problematic, and in case of paired = TRUE it would have produced flat out wrong results.
• Documentation improvements
• Improved print = markdown output of tadaa_aov, tadaa_t.test, tadaa_wilcoxon, tadaa_one_sample, tadaa_kruskal. Unfortunately print = "console" now has headers with unparsed \(\LaTeX\)-expressions, but who uses that anyway.

Deprecations

• labels_to_factor: Was a wrapper around haven::as_factor and is obsolete by now, as as_factor can do the same thing this function was built for.
• tadaa_likertize is renamed to likertize, deprecated since sjmisc::split_var is probably better anyway.

tadaatoolbox 0.11.0

New Features

• tadaa_aov now knows about types, uses type 1 by default and can do types 2 and 3.
  • Method for effect size calculation now uses lsr::etaSquared, which also takes a type argument.
• Add tadaa_mean_ci: Plots means with 95% confidence intervals as errorbars (thanks Christoph for the suggestion).
• Add tadaa_one_sample: For one-sample t-tests and finally an easy z-test.
  • Add confint_norm: Helper to get CIs, similar to confint_t
• Add tadaa_wilcoxon: For when tadaa_t.test isn’t non-parametric enough. Same usage.
  • Additionally displays medians of each group.
• Add tadaa_kruskal: For when tadaa_aov isn’t non-parametric enough, too.
• Move tadaa_sem ➡ mean_ci_sem because it’s more confint than tadaa.
• Add show_n option to tadaa_int: Optionally display N in subtitle.

Tweaks, Patches & Bug Fixes

• Fix documentation inconsistencies.
• Turns out pval_string(0.05) returned < 0.05. Well. That was embarrassing.
• Minor tweaks to theme_readthedown regarding text placement.

Data

• Remove superfluous variables from ngo: index, zeng, zdeutsch, zmathe.

tadaatoolbox 0.10.0

Minor changes

• New function: tadaa_normtest lets you do tests for normality (4 methods) over multiple variables.
• New function: tadaa_heatmap generates a heatmap. Mhhh, heatmaps.
• New function: tadaa_sem shows the standard error of the mean and it’s confidence interval
• New function: pval_string as a modification of pixiedust::pvalString that includes p < .05.
• Added a ggplot2 theme for the rmdformats::readthedown Rmd template.
• tadaa_aov, tadaa_t.test and the new tadaa_normtest now return a data.frame by default, allowing further shenanigans

Patch changes

• New options in tadaa_int:
  • Set grid = TRUE for the two interaction plots to be printed in a grid via cowplot::plot_grid.
    
  • Choose the plot labels via the labels argument.
• tadaa_int plot output now also is a little tidier and optimized for smaller widths.
• tadaa_aov now also shows Cohen’s f for easier power calculations based on f (pwr, G*power)
• Add option reduce to modus, so multiple results will be concatenated to a character by default.
• Add additional option as_character to modus because guessing about return value classes is no joke.
• Fix issues with generate_recodes and interval_labels (#1).

tadaatoolbox 0.9.0

Minor changes

• Add tadaa_ord as ordinal equivalent of tadaa_nom.
• Make table output of both of the former functions smaller in width by abbreviating column names
• Add brewer_palette option to tadaa_int
• Dependencies declared in DESCRIPTION are still experimental because of uncertainty regarding failing travis builds. I don’t know what’s going on there.

Patch changes

• Add family tag to tadaa_ functions so their documentation is linked
• Fix return values of tadaa_aov, _t.test and _nom which did not work as I expected

tadaatoolbox 0.8.1

• Fix typo in DESCRIPTION, misspelling pixiedust. Sorry!
• Bump dependencies
  • pixiedust depends on R (>= 3.2.1), so we might as well depend on that version, too
  • Specifiy minimal versions for pixiedust, sjmisc, and broom, just to be safe
• Add vignette
  • Overhauling README to be less redundant compared to the usage vignette

tadaatoolbox 0.8.0

• Added a NEWS.md file to track changes to the package.
• Working on CRAN compatibility
• Submitted to CRAN
• It’s on CRAN, yay!