How To Use Aggregate Function In R?

How do you use the Summarize function in R?

The combination of group_by and summarize is frequently done in R using the pipe operator. The pipe operator redirects the output of one function as the input of the next.

Mastering summarize and group_by

  • starwars %>%
  • group_by(species) %>%
  • summarize(avg= mean(height,na. rm=TRUE))

How does Group_by work in R?

Group by one or more variables

Most data operations are done on groups defined by variables. group_by() takes an existing tbl and converts it into a grouped tbl where operations are performed “by group”. ungroup() removes grouping.

How do I aggregate data?

To aggregate data is to compile and summarize data; to disaggregate data is to break down aggregated data into component parts or smaller units of data.

What is N () in R?

n=n() means that a variable named n will be assigned the number of rows (think number of observations) in the summarized data. the %>% is read as “and then” and is way of listing your functions sequentially rather then nesting them.