Removing Categorical Variables from ggplot Density/Histograms: Choosing the Best Approach for Excluding Unknown Categories

Performing Simulations Using Normal and Log-Normal Distributions in R

Retrieving Elevation Data for Multiple Coordinates in R: A Step-by-Step Guide

Scaling Point Size and Color in ggvis: A Step-by-Step Solution to Overcome the Error with Dynamic Interactivity

Finding Start and End Points of Sequences using Run Length Encoding in R

Removing Duplicates in R: A Performance Analysis

Understanding Why Looping Over Unique Value Returns 1

How to Replace Missing Values with the Opposite of the First Non-Missing Value in Each Group Using zoo Package in R

Conditionally Revalue Factors in R: A Step-by-Step Guide

How to Add External Images to PowerPoint Presentations Using R: A Step-by-Step Guide