anat: Display the Anatomy of a Data Frame

In Kmisc: Kevin Miscellaneous

Description

This function displays the 'anatomy' of a data frame. In practice, it's used to implement a faster version of str for data frames built entirely of atomic vectors, as str.data.frame is very slow for large data frames. If there are non-atomic vectors in df, we fall back to base::str.

Usage

anat(df, n = 3, cols = 99)

anatomy(df, n = 3, cols = 99)

Arguments

df	An object inheriting class data.frame.
n	The number of elements to print from each vector.
cols	The number of columns to print from the data.frame.

Examples

## Not run: 
local({
  bigDF <- as.data.frame( matrix( factor(1:1E3), nrow=1E3, ncol=1E3 ) )
  sink( tmp <- tempfile() )
  str <- system.time( str(bigDF, list.len=1E3) )
  anat <- system.time( anat(bigDF) )
  sink()
  unlink(tmp)
  print( rbind( str, anat ) )
})

## End(Not run)

Example output

     user.self sys.self elapsed user.child sys.child
str      0.418    0.003   0.422          0         0
anat     0.028    0.000   0.028          0         0

Kmisc documentation built on May 29, 2017, 1:43 p.m.