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ffbase (version 0.6-2)

Basic statistical functions for package ff

Description

Basic (statistical) functionality for package ff

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Version

Install

install.packages('ffbase')

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Version

0.6-2

License

GPL-3

Maintainer

Edwin Jonge

Last Published

November 26th, 2012

Functions in ffbase (0.6-2)

ffdfappend

Append a dataframe or an ffdf to another ffdf

subset.ff

Subsetting a ff vector or ffdfdata frame

all.ff

Summary methods for ff objects

with.ffdf

Evaluate an expression in a ffdf data environment

chunkify

Chunkify an element-wise function

Tabulation for ff vectors

+.ff_vector

Arithmetic Operators for ff vectors

unique.ff

Unique values for ff and ffdf objects

expand.ffgrid

Create a ffdf from All Combinations of Factors

condMean

Fast conditional mean

bigglm.ffdf

Bounded memory linear regression

table.ff

table.ff uses the cross-classifying factors to build a contingency table of the counts at each combination of factor levels. If ... does not contain factors, unique.ff will add a levels attribute to the non-factors.

pack.ffdf

Packs ffdf data.frames into a compressed file

ffifelse

Conditional Element Selection for ff vectors.

grouprunningcumsum

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

byMean

Fast conditional mean

bySum

Fast conditional sum

transform.ffdf

Transform a ffdf data.frame

save.ffdf

Save ffdf data.frames in a directory

unpack.ffdf

Unpacks previously stored ffdf data.frame into a directory

ffdfdply

Performs a split-apply-combine on an ffdf

addfforder

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

ffdfwith

Evaluate an expression in a ffdf data environment

ffrep.int

Replicate Elements of ff vectors.

abs.ff_vector

Math for ff vectors

ffbase-package

Basic statistical functions for ff

cumsum.ff

Cumulative Sums, Products, and Extremes

c.ff

Concatenate ff vectors

compact

Compact a ff vector or ffdf data frame

droplevels.ff

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

key

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

sum.ff

Sum of ff vector Elements

is.na.ff

'Not Available' / Missing Values for ff vectors The generic function is.na indicates which elements are missing. The generic function is.na<- sets elements to NA.

binned_tabulate

Fast tabulating in different bins

droplevels.ffdf

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

cut.ff

Convert Numeric ff vector to factor ff

duplicated.ff

Duplicated for ff and ffdf objects

binned_sumsq

Fast summing in different bins

Use LaF to import data into ffdf data.frame

ffmatch

Value Matching for ff objects

>.ff_vector

Ops for ff vectors

ffdfsave

Save a ffdf data.frame in directory

hist.ff

hist for ff vectors

ffseq_len

Sequence Generation of ff vectors.

ffwhich

Create an index from a filter statement

move.ffdf

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

any.ff

Summary methods for ff objects

min.ff

Minimum, maximum and range of ff vector

merge.ffdf

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

mean.ff

Mean of ff vector

ffappend

Append a ff vector to another ff vector

load.ffdf

Loads ffdf data.frames from a directory

as.character.ff

Character Vectors The generic function as.character converts ff vectors to characters.

binned_sum

Fast summing in different bins

within.ffdf

Evaluate an expression in a ffdf data environment