broom (version 0.3.4)

data.frame_tidiers: Tidiers for data.frame objects

Description

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.

Usage

## S3 method for class 'data.frame':
tidy(x, ...)
## S3 method for class 'data.frame':
augment(x, data, ...)
## S3 method for class 'data.frame':
glance(x, ...)

Arguments

x

A data.frame

...

extra arguments: for tidy, these are passed on to describe from psych package

data

data, not used

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

The tidy method calls the psych method describe directly to produce its per-columns summary statistics.

See Also

describe

Examples

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()