Fred questions

• Read multiple .gpx files
• Create a variable capturing the most frequent occurence by group
• Reshape data frame from wide to panel with multiple variables and some time invariant
• Split vector of strings and paste subset of resulting elements into a new vector
• How to create, structure, maintain and update data codebooks in R?
• How to change order of boxplots when using ggplot2?
• Read multiple CSV files into separate data frames

Fred answers