In this tutorial, we will learn how to rename one or more columns of a dataframe in R. We will use rename() function in dplyr R package to change the name of a single column first and then see an example of using rename() function to rename more than one columns. Let us get … [Read more...] about How to rename one or more columns of a dataframe
How to select only numeric columns in a dataframe
In this tutorial, we will learn how to select the columns that are numeric from a dataframe containing columns of different datatype. We will use dplyr's select() function in combination with where() and is.numeric() functions to select the numeric columns. Let us first load … [Read more...] about How to select only numeric columns in a dataframe
How to Split a Dataframe into a list of Dataframes by groups in R
In this tutorial, we will learn how to split a dataframe into a list of dataframes by groups in R. We will first learn how to use the base R function, split(), to divide a dataframe into multiple dataframes into a list. Then, we will learn how to use dplyr's group_split() … [Read more...] about How to Split a Dataframe into a list of Dataframes by groups in R
How to sum a column by group in R
In this tutorial, we will learn how to compute the sum of a column by groups in another column in a dataframe. Basic, idea is to group the dataframe by the grouping variable/column and then find the sum for each group. Let us get started by loading tidyverse suite of R … [Read more...] about How to sum a column by group in R
How to extract a column of a dataframe as a vector in R
In this tutorial, we will learn how to extract a column from a dataframe in R. We will extract a column as a vector using base R method and then see multiple examples of using dplyr's pull() function to extract a column from a dataframe. Getting Ready with Packages and Data … [Read more...] about How to extract a column of a dataframe as a vector in R