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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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Install

install.packages('ffbase')

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Version

0.12.3

License

GPL-3

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Repository

http://github.com/edwindj/ffbase

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

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