Author name: Erik Marsja

PhD in Psychology, Linköping University. Main interest is experimental and cognitive psychology. Enjoy programming in Python and R.

how to select certain columns in R

Select Columns in R by Name, Index, Letters, & Certain Words with dplyr

Leave a Comment / Programming, R /

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 […]

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Bartlett's test and Levene's test in Python

Levene’s & Bartlett’s Test of Equality (Homogeneity) of Variance in Python

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In this Python tutorial, you will learn how to 1) perform Bartlett’s Test, and 2) Levene’s Test. Both are tests that are testing the assumption of equal variances. Equality of variances (also known as homogeneity of variance, and homoscedasticity) in population samples is assumed in commonly used comparison of means tests, such as Student’s t-test

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