RHertel questions

RHertel answers

• Referring one data frame to perform analysis on another data frame
• Create new columns based on rows
• How to set thousands separator in R?
• nested ifelse in R so close to working
• Call an object using a function in R
• as.POSIXlt ignores tz argument
• R, how can I make a heatmap out of a simple matrix? [duplicate]
• R Optimal way to create time series from start and end dates for groups
• Remove rows containing string in any vector in data frame
• How I can retrieve the list of all symbols accessible through getSymbols in quantmod?