by Erik Marsja | Apr 14, 2021 | Programming, R

In this tutorial, you will learn how to do the Brown-Forsythe test in R. This test is great as you can use it to test the assumption of homogeneity of variances, which is important for e.g. Analysis of Variance (ANOVA). Outline of the Post This post is...
by Erik Marsja | Feb 14, 2021 | Programming, R

In this guide you will learn how to concatenate two columns in R. In fact, you will learn how to merge multiple columns in R using base R (e.g., using the paste function) and Tidyverse (e.g. using str_c() and unite()). In the final section of this post, you will learn...
by Erik Marsja | Jan 18, 2021 | Programming, R

In this short tutorial, you will learn how to find the five-number summary statistics in R. Specifically, in this post we will calculate: MinimumLower-hingeMedianUpper-hingeMaximum Now, we will also visualize the five-number summary statistics using a boxplot. First,...
by Erik Marsja | Jan 4, 2021 | Programming, Python

In this Python data visualization tutorial, we are going to learn how to create a violin plot using Matplotlib and Seaborn. Now, there are several techniques for visualizing data (see the post 9 Data Visualization Techniques You Should Learn in Python for some...
by Erik Marsja | Jan 2, 2021 | Programming, R

In this very short tutorial, you will learn by example how to use the operator $ in R. First, we will learn what the $ operator does by getting the answer to some frequently asked questions. Second, we will work with a list that we create, and use the dollar sign...
by Erik Marsja | Dec 10, 2020 | Programming, R

In this data science tutorial, you will learn how to rename a column (or multiple columns) in R using base functions as well as dplyr. Renaming columns in R is a very easy task, especially using the rename() function. Now, renaming a column with dplyr and the rename()...