ff: length.ffdf – R documentation

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length.ffdf

Getting length of a ffdf dataframe

Getting "length" (number of columns) of a ffdf dataframe

## S3 method for class 'ffdf'
length(x)

`x`	an `ffdf` object

integer number of columns

Jens Oehlschlägel

length(as.ffdf(data.frame(a=1:26, b=letters, stringsAsFactors = TRUE)))
  gc()

Memory-Efficient Storage of Large Data on Disk and Fast Access Functions

v4.0.4

GPL-2 | GPL-3 | file LICENSE

Authors

Daniel Adler [aut], Christian Gläser [aut], Oleg Nenadic [aut], Jens Oehlschlägel [aut, cre], Martijn Schuemie [aut], Walter Zucchini [aut]

Initial release

2020-10-13