R

How-tos How to Read a Text File Line by Line in R This article shows how to process or read a plain text file line by line in R. ↗ How-tos How to Pass Command Line Arguments to R CMD BATCH and Rscript This article shows how to pass command line arguments to R CMD BATCH and Rscript, and how to save the output as a file. ↗ How-tos How to Remove User-Defined Objects From the Workspace in R This article shows how to remove user-defined objects from the workspace in R using the rm() function and the Environment tab of R Studio. ↗ How-tos How to Uninstall R and All Its Packages on Windows This article shows how to uninstall R and all its packages on Windows. Uninstalling R only removes the original installation files. To remove the packages, we need to find the … ↗ How-tos How to Find the Null Space of a Matrix in R This article shows how to find the null space of a matrix in R using the nullspace function of the pracma package. ↗ How-tos How to Remove Object Names and Dimnames in R This article shows how to remove the names and dimnames of objects and get only the values in R. Different approaches such as the unname() function, the as.vector() function, etc. … ↗ How-tos How to Set Location of Current File as Working Directory in R Studio This article shows how to set the location or path of the current R script or Rmd file as the working directory in R Studio, without any user intervention or interaction. It shows … ↗ How-tos How to Generate a Regular Sequence of Numbers in R This article shows how to easily generate a regular sequence of numbers in R using the colon operator and the seq() function. ↗ How-tos How to Convert Multiple Columns From Integer to Numeric Type in R This article shows how to convert multiple columns from integer to a numeric type using a single command in R. The examples include base R and dplyr approaches to perform the … ↗ How-tos How to Interpret Output of system.time Function in R This article briefly explains what is being measured by the system.time function in R. It then provides simple examples to illustrate what each of the components user, system and … ↗ How-tos How to Use the Source Function to Run Another R Script This article demonstrates how to use the source function of base R to run another R script which may be located in the same directory as the first script or in a different … ↗ How-tos How to Customize the PCA Biplot in R This article demonstrates how to customize the PCA biplot in R. Several defaults are modified to obtain a more useful visualization of the biplot. ↗ How-tos How to Use the if and if...else Statements in R This article describes the syntax of if and if-else constructs of R, emphasizing the peculiarities. The code examples illustrate all the points provided. ↗ How-tos How to Use the group_by Function in R Dplyr This article shows how to use the group_by() function from R's dplyr package to group rows for data analysis. It shows how we can combine group_by() with the summarize() or … ↗ How-tos How to Perform K-Means Clustering in Base R This article shows how to perform K-means clustering using base R functions. All steps, including the elbow bend plot to choose K, and the PCA scatter plot when there are more than … ↗ How-tos How to Create and Visualize a Correlation Matrix in R This article first shows how to prepare data to create a correlation matrix in R. It then demonstrates the use of the cor() function to create a correlation matrix, and the … ↗ How-tos How to Test for Normality of Data in R This article demonstrates three techniques to assess the normality of ungrouped, univariate data in R. Visually, we can assess the normality using a histogram or a Q-Q plot. For a … ↗ How-tos How to Create and Interpret Dummy Variables in R This article shows how to easily create dummy variables in R using the fastDummies package. It concludes with a section on how to interpret the dummy variables in a linear … ↗ How-tos How to Use Cross-Validation for a KNN Classification Model in R This article demonstrates how to use the caret package to build a KNN classification model in R using the repeated k-fold cross-validation technique. The train function also … ↗ How-tos How to Perform Logistic Regression in R This tutorial demonstrates how to perform logistic regression in R. ↗ How-tos How to Concatenate Strings in R This tutorial demonstrates how to concatenate strings in R. ↗ How-tos The fread() Function in R This tutorial demonstrates how to use fread function in R. ↗ How-tos How to Perform Polynomial Regression in R This tutorial demonstrates how to perform polynomial regression in R. ↗ How-tos How to Omit NA in R This tutorial demonstrates how to remove unnecessary NA values using na.omit() in R. ↗