Smoothing Shaded Error Bars in ggplot2 with geom_xspline and Custom Splines

Grouping and Aggregation in R: Best Practices for Efficient Data Analysis

Extracting Specified Number of Words After a String in R Using stringr Package

Importing CSV Files with R: A Step-by-Step Guide to Avoid Common Pitfalls and Errors

Understanding GAM Models and the Error in Plot Output

Resuming R Sessions After Sleep on macOS: Strategies and Workarounds for Productivity

Logarithms in R: A Guide to Matrix Operations and Avoiding Warnings

Here is a complete code snippet that combines all the interleaved code you wrote in a nice executable codeblock:

Merging Adjacent Columns in R Data Frames: Two Effective Approaches

Lowering Model Sensitivity for the Starting Value of a Weighting Function in MIDAS Regression using R