Aggregate Data Table R. The by argument is a list of variables to group by. In a recent post we learned how to use the reshape package by Hadley Wickham in order to aggregate and reshape data in R using the melt and cast functions.
If x is not a data frame it is coerced to one which must have a non-zero number of rows. Ask Question Asked 2 years 10 months ago. The cast function is wonderful but it has one problem the format of the output.
As a result of this the variables are divided into categories depending on the sets in which they can be segregated.
The name of the data frame FUN. When you reshape data you alter the structure rows and columns determining how the data is organized. Occasionally you may want to aggregate daily data to weekly monthly or yearly data in R. Aggregate quickly with data.
