Understanding `ggplot2` and Frequency Polygons: A Step-by-Step Guide to Increasing Line Size in Frequency Polygons

Here's a summary of the provided information and some additional examples to demonstrate the usage of the `melt()` function in R:

Filtering Data to One Daily Point Per Individual Using dplyr in R

Binning Continuous Variables: A Practical Guide to Discrete Categories Without Overlapping Values

Unit Testing Shiny Apps with shinytest and testthat: A Comprehensive Guide to Reliability and Maintainability

Overcoming the Limitations of sapply: A Guide to Efficient Vectorized Operations in R

Understanding Deflation of Income Data with R: A Practical Guide to Adjusting for Inflation

Using KNN for Classification with R: A Step-by-Step Approach

Understanding Mathematical Symbols in ggplot Axis Labels Using LaTeX2Exp Package for Customization

Understanding Date Filtering and Subsampling in R: A Comprehensive Guide to Removing Dates from Vectors