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

Improving Data Reshaping for Advanced Analysis: Mixed Effects Models vs Traditional Linear Regression

Improved Matrix Fold Change Calculation Function in R Using Matrix Operations and dplyr/Purrr

Formatting HTML Output from R Table like Excel Pivot Table Using htmlTable Function

Reshaping Data with Embedded Columns and Year Names in R Programming Language