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 structured as follows. First, we start by answering […]
How to Do the Brown-Forsythe Test in R: A Step-By-Step Example Read More »
In this guide, you will learn how to concatenate two columns in R. 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 which function is the best to use
How to Concatenate Two Columns (or More) in R – stringr, tidyr Read More »
In this short tutorial, you will learn how to find the five-number summary statistics in R. Specifically, in this post, we will calculate: Now, we will also visualize the five-number summary statistics using a boxplot. First, we will learn how to calculate each of the five summary statistics and then how we can use one
How to Calculate Five-Number Summary Statistics in R Read More »
In this Python data visualization tutorial, we will learn how to create a violin plot in Python with Matplotlib and Seaborn. We can carry out several techniques for visualizing data (see the post 9 Data Visualization Techniques You Should Learn in Python for some examples). Violin plots combine both the box plot and the histogram.
How to Make a Violin plot in Python using Matplotlib and Seaborn Read More »
In this R tutorial, you will learn how to work with $ in R. First, we will have a look at a couple of examples for a list object and then for a dataframe object.
How to use $ in R: list & dataframe Examples Read More »
In this data science tutorial, you will learn how to rename a column (or multiple columns) in R using base functions and dplyr. Renaming columns in R is very easy, especially using the rename() function. Now, renaming a column with dplyr and the rename() function is super simple. But, of course, it is not super
How to Rename Column (or Columns) in R with dplyr Read More »
This tutorial will cover how to calculate absolute value in R. it will cover how to compute absolute values using the built-in function abs(), e.g., abs(YourVector). The following section will give you a detailed outline of what this R tutorial covers.
How to Take Absolute Value in R – vector, matrix, & dataframe Read More »
In this post, you will learn how to select columns in R. Selecting specific columns is crucial when working with data in Psychology and data science. Whether you are analyzing survey data to examine relationships between variables or performing data-wrangling tasks, knowing how to extract relevant columns may be essential for your analysis. Imagine you
Select Columns in R by Name, Index, Letters, & Certain Words with dplyr Read More »
In this Python data analysis tutorial, you will learn how to perform a paired sample t-test in Python. First, you will learn about this type of t-test (e.g. when to use it, the assumptions of the test). Second, you will learn how to check whether your data follow the assumptions and what you can do
How to use Python to Perform a Paired Sample T-test Read More »
In this tutorial, related to data analysis in Python, you will learn how to deal with your data when it is not following the normal distribution. One way to deal with non-normal data is to transform your data. In this post, you will learn how to carry out Box-Cox, square root, and log transformation in
How to use Square Root, log, & Box-Cox Transformation in Python Read More »