tidy_summary: This function calculates the five-number summary (minimum,...

In moderndive: Tidyverse-Friendly Introductory Linear Regression

This function calculates the five-number summary (minimum, first quartile, median, third quartile, maximum) for specified numeric columns in a data frame and returns the results in a long format. It also handles categorical, factor, and logical columns by counting the occurrences of each level or value, and includes the results in the summary. The type column indicates whether the data is numeric, character, factor, or logical.

Description

This function calculates the five-number summary (minimum, first quartile, median, third quartile, maximum) for specified numeric columns in a data frame and returns the results in a long format. It also handles categorical, factor, and logical columns by counting the occurrences of each level or value, and includes the results in the summary. The type column indicates whether the data is numeric, character, factor, or logical.

Usage

tidy_summary(df, columns = names(df), ...)

Arguments

df	A data frame containing the data. The data frame must have at least one row.
columns	Unquoted column names or tidyselect helpers specifying the columns for which to calculate the summary. Defaults to call columns in the inputted data frame.
...	Additional arguments passed to the min, quantile, median, and max functions, such as na.rm.

Value

A tibble in long format with columns:

column

The name of the column.

n

The number of non-missing values in the column for numeric variables and the number of non-missing values in the group for categorical, factor, and logical columns.

group

The group level or value for categorical, factor, and logical columns.

type

The type of data in the column (numeric, character, factor, or logical).

min

The minimum value (for numeric columns).

Q1

The first quartile (for numeric columns).

mean

The mean value (for numeric columns).

median

The median value (for numeric columns).

Q3

The third quartile (for numeric columns).

max

The maximum value (for numeric columns).

sd

The standard deviation (for numeric columns).

Examples

# Example usage with a simple data frame
df <- tibble::tibble(
  category = factor(c("A", "B", "A", "C")),
  int_values = c(10, 15, 7, 8),
  num_values = c(8.2, 0.3, -2.1, 5.5),
  one_missing_value = c(NA, 1, 2, 3),
  flag = c(TRUE, FALSE, TRUE, TRUE)
)

# Specify columns
tidy_summary(df, columns = c(category, int_values, num_values, flag))

# Defaults to full data frame (note an error will be given without
# specifying `na.rm = TRUE` since `one_missing_value` has an `NA`)
tidy_summary(df, na.rm = TRUE)

# Example with additional arguments for quantile functions
tidy_summary(df, columns = c(one_missing_value), na.rm = TRUE)

moderndive documentation built on Sept. 11, 2024, 9:26 p.m.