In this tutorial, we will show how to compute inverse of matrix in R. Computing inverse of a matrix is core to multiple applications. In linear algebra, inverse of a matrix is defined as a matrix that, when multiplied by the original matrix, results in the identity matrix. … [Read more...] about How to compute inverse of a matrix in R
rstats101
How to add Prefix/Suffix to Column Names of a dataframe in R
In this tutorial we will learn how to add a prefix or a suffix to column names of a data frame in R. We will use dplyr's rename_with() function to add prefix/suffix to column names. dplyr's rename_with() function belongs to another renaming function in dplyr, rename() that is … [Read more...] about How to add Prefix/Suffix to Column Names of a dataframe in R
How to Measure Running Time in R (with two examples)
In this tutorial, we will learn how to measure execution time in R. We will learn two ways, using Sys.time() and system.time, of measuring execution time in R. Both the methods to measure running time are readily available in base R and do need use any outside R packages. … [Read more...] about How to Measure Running Time in R (with two examples)
dplyr arrange: Sort rows by one or more variables
In this tutorial, we will learn how to sort a dataframe by one or more columns using dplyr's arrange() function. dplyr's arrange() function is one of the important functions in dplyr that lets you use dplyr to sort rows. By sorting, we mean dplyr's arrange() changes the order … [Read more...] about dplyr arrange: Sort rows by one or more variables
How to use cbind() function in R
In this tutorial, we will learn how to use cbind() function in R. The cbind() function in the R programming language is used to combine vectors, matrices, or data frames by columns. cbind() stands for column bind as it combines by column. The basic syntax for using cbind() is … [Read more...] about How to use cbind() function in R