In this short R tutorial, you will learn how to extract days from datetime in R. This tutorial will contain a couple of examples containing R code and comments about the code. Extracting days from datetime is a task that we may need to do whenever we are working with a dataset and you want to carry out a time series analysis but only want to include day, for example. It is, of course, possible to use the similar methods as in this post to extract timestamps from datetime, as well.
As R is a versatile statistical programming language, there are many ways to carry out this extraction task. For instance, we can extract days with the format function. However, first we need to have converted a vector, or a column in a dataframe, to a as.POSIXct class.