R: Add the number of observations for each key in a 'tsibble'

add_n_obs {brolgar}

R Documentation

Add the number of observations for each key in a `tsibble`

Description

Here, we are not counting the number of rows in the dataset, but rather we are counting the number observations for each keys in the data.

Usage

add_n_obs(.data, ...)

Arguments

`.data`	tsibble
`...`	extra arguments

Value

tsibble with n_obs, the number of observations per key added.

Examples

library(dplyr)
# you can explore the data to see those cases that have exactly two 
 # observations:
heights %>% 
  add_n_obs() %>% 
  filter(n_obs == 2)