eeptools (version 1.2.5)

isid: A function to check if a set of variables form a unique ID in a dataframe.

Description

When passed a set of variable names and a dataframe, this function returns a check TRUE/FALSE whether or not the variables together uniquely identify a row in the dataframe.

Usage

isid(data, vars, verbose = FALSE)

Value

TRUE or FALSE. TRUE indicates the variables uniquely identify the rows. FALSE indicates they do not.

Arguments

data

A dataframe.

vars

A character vector specifying the column names in the dataframe to check as unique.

verbose

A logical, default FALSE. If TRUE, isid will tell you how many rows you need and how many your variables uniquely identify

Author

Jared E. Knowles

Examples

data(stuatt)
isid(stuatt, vars = c("sid"))
isid(stuatt, vars = c("sid", "school_year"))
isid(stuatt, vars = c("sid", "school_year"), verbose = TRUE)