Publications by R on Stats and R
Chi-square test of independence in R
Introduction Example Data Chi-square test of independence Conclusion and interpretation Introduction This article explains how to perform the Chi-square test of independence in R and how to interpret its results. To learn more about how the test works and how to do it by hand, I invite you to read the article “Chi-square test of independence b...
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Fisher’s exact test in R: independence test for a small sample
Introduction Hypotheses Example Data Observed frequencies Expected frequencies Fisher’s exact test in R Conclusion and interpretation References Introduction After presenting the Chi-square test of independence by hand and in R, this article focuses on the Fisher’s exact test. Independence tests are used to determine if there is a significa...
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Fisher’s exact test in R: independence test for a small sample
Introduction Hypotheses Example Data Observed frequencies Expected frequencies Fisher’s exact test in R Conclusion and interpretation References Introduction After presenting the Chi-square test of independence by hand and in R, this article focuses on the Fisher’s exact test. Independence tests are used to determine if there is a significa...
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Do my data follow a normal distribution? A note on the most widely used distribution and how to test for normality in R
What is a normal distribution? Empirical rule Parameters Probabilities and standard normal distribution Areas under the normal distribution in R and by hand Ex. 1 In R By hand Ex. 2 In R By hand Ex. 3 In R By hand Ex. 4 In R By hand Ex. 5 Why is the normal distribution so crucial in statistics? How to test the normality assumption Histogram ...
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Do my data follow a normal distribution ? A note on the most widely used distribution and how to test for normality in R
What is a normal distribution? Empirical rule Parameters Probabilities and standard normal distribution Areas under the normal distribution in R and by hand Ex. 1 In R By hand Ex. 2 In R By hand Ex. 3 In R By hand Ex. 4 In R By hand Ex. 5 Why is the normal distribution so crucial in statistics? How to test the normality assumption Histogram ...
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An efficient way to install and load R packages
What is a R package and how to use it? Inefficient way to install and load R packages More efficient way Most efficient way {pacman} package {librarian} package What is a R package and how to use it? Unlike other programs, only fundamental functionalities come by default with R. You will thus often need to install some “extensions” to perfor...
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An efficient way to install and load R packages
What is a R package and how to use it? Inefficient way to install and load R packages More efficient way What is a R package and how to use it? Unlike other programs, only fundamental functionalities come by default with R. You will thus often need to install some “extensions” to perform the analyses you want. These extensions which are are ...
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The complete guide to clustering analysis: k-means and hierarchical clustering by hand and in R
What is clustering analysis? Application 1: Computing distances Solution k-means clustering Application 2: k-means clustering Data kmeans() with 2 groups Quality of a k-means partition nstart for several initial centers and better stability kmeans() with 3 groups Optimal number of clusters Elbow method Silhouette method Gap statistic method NbCl...
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The complete guide to clustering analysis: k-means and hierarchical clustering by hand and in R
What is clustering analysis? Application 1: Computing distances Solution k-means clustering Application 2: k-means clustering Data kmeans() with 2 groups Quality of a k-means partition nstart for several initial centers kmeans() with 3 groups Manual application and verification in R Solution by hand Solution in R Hierarchical clustering Applica...
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Getting started in R markdown
R Markdown: what, why and how? Before you start Components of a .Rmd file YAML header Code chunks Text Code inside text Highlight text like it is code Images Tables Additional notes and useful resources If you have spent some time writing code in R, you probably have heard of generating dynamic reports incorporating R code, R outputs (results)...
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