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ffbase (version 0.12.3)

Basic Statistical Functions for Package 'ff'

Description

Extends the out of memory vectors of 'ff' with statistical functions and other utilities to ease their usage.

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Version

Install

install.packages('ffbase')

Monthly Downloads

124

Version

0.12.3

License

GPL-3

Issues

20

Pull Requests

0

Stars

35

Forks

15

Maintainer

Edwin Jonge

Last Published

March 23rd, 2016

Functions in ffbase (0.12.3)

as.ffdf.ffdf

Trivial implementation, but very handy
byMean

Fast conditional mean
bySum

Fast conditional sum
c.ff

Concatenate ff vectors
cumsum.ff

Cumulative Sums, Products, and Extremes
ffseq_len

Sequence Generation of ff vectors.
binned_sumsq

Fast squared summing in different bins
as.ram.ffdf

As ram for an ffdf to get your ffdf as a data frame in RAM
chunkify

Chunkify an element-wise function
+.ff_vector

Arithmetic Operators for ff vectors
all.ff

Summary methods for ff objects
as.Date.ff_vector

Date Conversion Functions for ff vector
ikey

Creates a unique integer key for unique combinations of rows of an ffdf
condSum

Fast conditional sum
cut.ff

Convert Numeric ff vector to factor ff
binned_sum

Fast summing in different bins
condMean

Fast conditional mean
as.character.ff

Character Vectors
droplevels.ffdf

The function droplevels is used to drop unused levels from factors in a ffdf
bigglm.ffdf

Bounded memory linear regression
mean.ff

Mean of ff vector
ffappend

Append a ff vector to another ff vector
set_ffbase_logging

sets the logging of ffbase
ffdfrbind.fill

rbind for ffdf where missing columns are added if not available in one of the ffdf objects
pack.ffdf

Packs ffdf data.frames into a compressed file
ffmatch

Value Matching for ff objects
grouprunningcumsum

Groups the input integer vector into several groups if the running cumulative sum increases a certain maximum number
rle_ff

Compute the lengths and values of runs of equal values in a vector
chunkexpr

Chunk an expression
diff.ff

Lagged Differences
ffdfwith

Evaluate an expression in a ffdf data environment
format.ff_vector

Date Conversion Functions for ff vector
binned_tabulate

Fast tabulating in different bins
min.ff

Minimum, maximum and range of ff vector
save.ffdf

Save ffdf data.frames in a directory
quantile.ff

quantiles
ffifelse

Conditional Element Selection for ff vectors.
expand.ffgrid

Create a ffdf from All Combinations of Factors
[.ffdf

Reading and writing data.frames (ffdf)
ffbase-package

Basic statistical functions for ff
ffdfappend

Append a dataframe or an ffdf to another ffdf
load.ffdf

Loads ffdf data.frames from a directory
unpack.ffdf

Unpacks previously stored ffdf data.frame into a directory
droplevels.ff

The function droplevels is used to drop unused levels from a ff factor or , more commonly, from factors in a ffdf
compact

Compact a ff vector or ffdf data frame
ffrep.int

Replicate Elements of ff vectors.
subset.ff

Subsetting a ff vector or ffdfdata frame
table

Cross Tabulation and Table Creation
within.ffdf

Evaluate an expression in a ffdf data environment
with.ffdf

Evaluate an expression in a ffdf data environment
move.ffdf

Moves all the columns of ffdf data.frames into a directory
abs.ff_vector

Math for ff vectors
ffdfsave

Save a ffdf data.frame in directory
unique.ff

Unique values for ff and ffdf objects
merge.ffdf

Merge two ffdf by common columns, or do other versions of database join operations.
duplicated.ff

Duplicated for ff and ffdf objects
hist2d.ff

compute and plot 2 dimensional histogram of ff data
ffseq

Sequence Generation of ff vectors.
ffwhich

Create an index from a filter statement
[.ff

Reading and writing vectors extended to handle logical ff vectors as indexes
tabulate.ff

Tabulation for ff vectors
hist.ff

hist for ff vectors
any.ff

Summary methods for ff objects
laf_to_ffdf

Use LaF to import data into ffdf data.frame
is.na.ff

'Not Available' / Missing Values for ff vectors
addfforder

Add the order of a ff vector of the ff vector x
sum.ff

Sum of ff vector Elements
>.ff_vector

Ops for ff vectors
ffdfdply

Performs a split-apply-combine on an ffdf
ffrandom

Generate ff vector with draws from distribution
transform.ffdf

Transform a ffdf data.frame
>.ff_vector

Ops for ff vectors