print.ff: Print and str methods

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

Print and str methods

Description

printing ff objects and compactly showing their structure

Usage

## S3 method for class 'ff'
print(x, ...)
## S3 method for class 'ff_vector'
print(x, maxlength = 16, ...)
## S3 method for class 'ff_matrix'
print(x, maxdim = c(16, 16), ...)
## S3 method for class 'ff'
str(object, nest.lev=0, ...)
## S3 method for class 'ffdf'
str(object, nest.lev=0, ...)

Arguments

x	a ff object
object	a ff object
nest.lev	current nesting level in the recursive calls to str
maxlength	max number of elements to print from an ff_vector
maxdim	max number of elements to print from each dimension from an ff_array
...	further arguments to print

Details

The print methods just print a few exmplary elements from the beginning and end of the dimensions.

Value

invisible()

Author(s)

Jens Oehlschlägel

See Also

ff, print, str

Examples

  x <- ff(1:10000)
  x
  print(x, maxlength=30)
  dim(x) <- c(100,100)
  x
  rm(x); gc()

ff documentation built on Feb. 16, 2023, 7:48 p.m.