Introduction It is Christmas time again! And just like last year, what better time than this to write about the great tools that are available to all interested in working with R. This post is meant as a praise to a few selected tools and packages that helped me to ...

Thank you ggplot2tutor for solving one of my struggles. Apparently this is all it takes: I can’t begin to count how often I have wanted to visualize a (normal) distribution in a plot. For instance to show how my sample differs from expectations, or to highlight the skewness ...

mlr receives Open Source Machine Learning Project Award mlr receives Open Source Machine Learning Project Award We’re extremely proud to have received the Open Source Machine Learning Project Award at ODSC West 2019. We were joined by Tensor...

About the bundle Jodie Burchell and yours truly have published two books, The Hitchhiker’s Guide to Ggplot and The Hitchhiker’s Guide to Plotnine, on graphing in both R and Python using ggplot2 and plotnine, which are cross-language equivalents. Yo...

About the bundle Jodie Burchell and yours truly have published two books, The Hitchhiker’s Guide to Ggplot and The Hitchhiker’s Guide to Plotnine, on graphing in both R and Python using ggplot2 and plotnine, which are cross-language equivalents. You can get the two books together for a special ...

mlr receives Open Source Machine Learning Project Award mlr receives Open Source Machine Learning Project Award We’re extremely proud to have received the Open Source Machine Learning Project Award at ODSC West 2019. We were joined by Tens...

About the bundle Jodie Burchell and yours truly have published two books, The Hitchhiker’s Guide to Ggplot and The Hitchhiker’s Guide to Plotnine, on graphing in both R and Python using ggplot2 and plotnine, which are cross-language equivalents. You can get the two books together for a special ...

dockr 0.8.6 is now available on CRAN. dockr is a minimal toolkit to build a lightweight Docker container image for your R package, in which the package itself is available. The Docker image seeks to mirror your R session as close as possible with respect to R specific dependencies. Both dependencies ...

The CBOE’s SKEW index has attracted some headlines among the press and blogosphere, as readings approach levels not see in the last year. If the index continues to draw attention, doomsayers will likely say this predicts the next correction or bear ...

Meta-analysis

<span class="n">library</span><span class="p">(</span><span class="n">dplyr</span><span class="p">)</span><span class="w"> </span><span class="c1"># data manipulation</span><span class="w">
</span><span class="n">library</span><span class="p">(</span><span class="n">ggplot2</span><span class="p">)</span><span class="w"> </span><span class="c1"># visualizations</span><span class="w">
</span><span class="n">library</span><span class="p">(</span><span class="n">metafor</span><span class="p">)</span><span class="w"> </span><span class="c1"># ready-made meta-analysis code</span><span class="w">
</span><span class="n">library</span><span class="p">(</span><span class="n">gt</span><span class="p">)</span><span class="w"> </span><span class="c1"># nice tables</span><span class="w">
</span>

Basic principle Scientific question Does playing Mozart to newborns improves their IQ? You look a bit around and find 3 studies :

<span class="n">etudes</span><span class="w"> </span><span class="o"><-</span><span class="w"> </span><span class="n">data.frame</span><span class="p">(</span><span class="w">
  </span><span class="n">article</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nf">c</span><span class="p">(</span><span class="s2">"A"</span><span class="p">,</span><span class="s2">"B"</span><span class="p">,</span><span class="s2">"C"</span><span class="p">),</span><span class="w">
  </span><span class="n">y</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nf">c</span><span class="p">(</span><span class="m">0.5</span><span class="p">,</span><span class="w"> </span><span class="m">0.01</span><span class="p">,</span><span class="w"> </span><span class="m">-0.1</span><span class="p">),</span><span class="w"> </span><span class="c1"># 0 no effect, <0 negative effect, >0 positive effect</span><span class="w">
  </span><span class="n">n</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nf">c</span><span class="p">(</span><span class="m">10</span><span class="p">,</span><span class="m">150</span><span class="p">,</span><span class="m">12</span><span class="p">),</span><span class="w">
  </span><span class="n">v</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nf">c</span><span class="p">(</span><span class="m">0.04</span><span class="p">,</span><span class="m">0.01</span><span class="p">,</span><span class="w"> </span><span class="m">0.03</span><span class="p">)</span><span class="w"> </span><span class="c1"># variance</span><span class="w">
</span><span class="p">)</span><span class="w">
</span><span class="n">etudes</span><span class="w"> </span><span class="o">%>%</span><span class="w"> </span><span class="n">gt</span><span class="w">
</span>

article y n v A 0.50 10 0.04 B 0.01 150 0.01 C -0.10 12 0.03 A simplistic way

<span class="n">etudes</span><span class="w"> </span><span class="o">%>%</span><span class="w">
  </span><span class="n">summarise</span><span class="p">(</span><span class="w">
    </span><span class="n">effet_resume</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">mean</span><span class="p">(</span><span class="n">y</span><span class="p">)</span><span class="w">
  </span><span class="p">)</span><span class="w">
</span>

  effet_resume
1    0.1366667

Weighted mean When we talk about mean, we usually refer to the arithmetic mean : {{...

The CBOE’s SKEW index has attracted some headlines among the press and blogosphere, as readings approach levels not see in the last year. If the index continues to draw attention, doomsayers will likely say this predicts the next correction or bear market. Perma-bulls will catalogue all the reasons not ...

What is this post about? Today on my way to work I was speaking to my girlfriend on the phone and somehow a conversation started about what are the chances that we will have a white Christmas this year. Being that Christmas is only a few days out and the ...

One hundred forty-four new packages made it to CRAN in November. Here are my picks for the “Top 40” in eight categories: Computational Methods, Data, Genomics, Machine Learning, Statistics, Time Series, Utilities, and Visualization. Computational Methods calculus v0.1.1: Provides C++ optimized functions for numerical and symbolic calculus including symbolic arithmetic, tensor ...