dplyr

Calculate cumulative sum (cumsum) by group in R

by roelpi
July 3, 2020April 5, 2021
3994 Comments
3 min read

In this blog post, I tackle a question that you recurringly see on a lot of boards. We are going to calculate the cumulative sum, but within a group that the rows belong to. Thanks to vegetableagony for pointing out that, depending on the size of the dataset, other conclusions…

by roelpi
June 15, 2020April 5, 2021
2 Comments
1 min read

Plotting bars in ggplot2 is easy. Yet, in many cases, you want to order these bars according to their frequency (count) or according to any other numeric value. In this blog post, I show you three ways to achieve this. First, let’s load the libraries and create the titanic data…

dplyr

Calculate cumulative sum (cumsum) by group in R

Reorder a ggplot2 bar chart by count