Tidiers for data.frame objects

Data frame tidiers are deprecated and will be removed from an upcoming release of broom.

# S3 method for data.frame
tidy(x, ..., na.rm = TRUE, trim = 0.1)

# S3 method for data.frame
glance(x, ...)

Arguments

x	A data.frame
...	Additional arguments for other methods.
na.rm	a logical value indicating whether NA values should be stripped before the computation proceeds.
trim	the fraction (0 to 0.5) of observations to be trimmed from each end of x before the mean is computed. Passed to the trim argument of mean()
data	data, not used

Source

Skew and Kurtosis functions are adapted from implementations in the moments package:
Lukasz Komsta and Frederick Novomestky (2015). moments: Moments, cumulants, skewness, kurtosis and related tests. R package version 0.14.
https://CRAN.R-project.org/package=moments

Value

tidy.data.frame produces a data frame with one row per original column, containing summary statistics of each:

column

name of original column

n

Number of valid (non-NA) values

mean

mean

sd

standard deviation

median

median

trimmed

trimmed mean, with trim defaulting to .1

mad

median absolute deviation (from the median)

min

minimum value

max

maximum value

range

range

skew

skew

kurtosis

kurtosis

se

standard error

glance returns a one-row data.frame with

nrow

number of rows

ncol

number of columns

complete.obs

number of rows that have no missing values

na.fraction

fraction of values across all rows and columns that are missing

Details

These perform tidy summaries of data.frame objects. tidy produces summary statistics about each column, while glance simply reports the number of rows and columns. Note that augment.data.frame will throw an error.

Examples

if (FALSE) {
td <- tidy(mtcars)
td

glance(mtcars)

library(ggplot2)
# compare mean and standard deviation
ggplot(td, aes(mean, sd)) + geom_point() +
     geom_text(aes(label = column), hjust = 1, vjust = 1) +
     scale_x_log10() + scale_y_log10() + geom_abline()
}