count_keys: See how many unique values of the joining key exist in your...

In stenhaug/combineR: A Package with Data and a Function to See Join Overlap Implications

Description

Give this function as many data frames as you want and the key and it tells you how many unique values are in each data frame for the keys you specify.

Usage

count_keys(..., df_names = NULL, keys)

Arguments

...	enter as many data frames as you would like
df_names	the data frame names
keys	the primary key or other key you wish to analyze

Examples

count_keys(demographics, math, ell, keys = c("student_id", "year"))
count_keys(list(demographics, math, ell),
     df_names = c("demographics", "math", "ell"),
     keys = c("student_id", "year"))

stenhaug/combineR documentation built on May 31, 2019, 5:13 p.m.