R programming language uses $ operator (dollar operator) for extracting or accessing elements from data structures like list or dataframe. For example, with $ operator we can select specific elements of a list or dataframe by their names instead of their position. In this … [Read more...] about How to use dollar $ operator in R
How to compute mean in R
In this tutorial, we will learn how to use mean() function in R to compute mean (or average) of a vector. In the most basic use case, mean() function takes a vector as input argument and computes arithmetic mean of the elements in the vector In R, we can learn more about … [Read more...] about How to compute mean in R
How to calculate cumulative sum in R
In this tutorial, we will learn how to calculate cumulative sum in R. With cumsum() function in base R, we. can compute cumulative sum of a vector in R. We will first see two examples of using cumsum() on a vector to compute cumulative sum and then we will compute cumulative … [Read more...] about How to calculate cumulative sum in R
dplyr rename(): How to rename column in r with dplyr
In this tutorial, we will learn how to rename column name of a dataframe in R using dplyr's rename() function. We will first see the basic syntax to use to change the name of a column with dplyr's rename(). Then we will see an example of of changing one column name and next wee … [Read more...] about dplyr rename(): How to rename column in r with dplyr
How to convert a matrix to a tidy table
In this tutorial, we will learn how to convert a data matrix to tidy long table. We will use tidyr's pivot_longer() function to reshape the matrix into a tidy table. First, let us start with loading the tidyverse suit of packages. Create a simulated data matrix … [Read more...] about How to convert a matrix to a tidy table