ffbase (version 0.13.3)

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')

Monthly Downloads

298

Version

0.13.3

License

GPL-3

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Repository

https://github.com/edwindj/ffbase

Maintainer

Edwin Jonge

Last Published

February 27th, 2021

Functions in ffbase (0.13.3)

binned_tabulate

Fast tabulating in different bins

as.ram.ffdf

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

bigglm.ffdf

Bounded memory linear regression

ffappend

Append a ff vector to another ff vector

condMean

Fast conditional mean

format.ff_vector

Date Conversion Functions for ff vector

condSum

Fast conditional sum

ffbase-package

Basic statistical functions for ff

binned_sum

Fast summing in different bins

as.Date.ff_vector

Date Conversion Functions for ff vector

[.ff

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

compact

Compact a ff vector or ffdf data frame

abs.ff_vector

Math for ff vectors

hist2d.ff

compute and plot 2 dimensional histogram of ff data

ffifelse

Conditional Element Selection for ff vectors.

unpack.ffdf

Unpacks previously stored ffdf data.frame into a directory

ffmatch

Value Matching for ff objects

as.ffdf.ffdf

Trivial implementation, but very handy

all.ff

Summary methods for ff objects

cumsum.ff

Cumulative Sums, Products, and Extremes

diff.ff

Lagged Differences

set_ffbase_logging

sets the logging of ffbase

with.ffdf

Evaluate an expression in a ffdf data environment

>.ff_vector

Ops for ff vectors

ffseq_len

Sequence Generation of ff vectors.

laf_to_ffdf

Use LaF to import data into ffdf data.frame

ffwhich

Create an index from a filter statement

load.ffdf

Loads ffdf data.frames from a directory

transform.ffdf

Transform a ffdf data.frame

unique.ff

Unique values for ff and ffdf objects

ffrep.int

Replicate Elements of ff vectors.

table

Cross Tabulation and Table Creation

[.ffdf

Reading and writing data.frames (ffdf)

as.character.ff

Character Vectors

ffseq

Sequence Generation of ff vectors.

droplevels.ff

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

c.ff

Concatenate ff vectors

min.ff

Minimum, maximum and range of ff vector

ffdfsave

Save a ffdf data.frame in directory

is.na.ff

'Not Available' / Missing Values for ff vectors

+.ff_vector

Arithmetic Operators for ff vectors

within.ffdf

Evaluate an expression in a ffdf data environment

expand.ffgrid

Create a ffdf from All Combinations of Factors

cut.ff

Convert Numeric ff vector to factor ff

any.ff

Summary methods for ff objects

move.ffdf

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

tabulate.ff

Tabulation for ff vectors

chunkexpr

Chunk an expression

rle_ff

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

addfforder

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

sum.ff

Sum of ff vector Elements

ffrandom

Generate ff vector with draws from distribution

ikey

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

subset.ff

Subsetting a ff vector or ffdfdata frame

grouprunningcumsum

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

pack.ffdf

Packs ffdf data.frames into a compressed file

droplevels.ffdf

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

ffdfrbind.fill

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

quantile.ff

quantiles

duplicated.ff

Duplicated for ff and ffdf objects

ffdfappend

Append a dataframe or an ffdf to another ffdf

save.ffdf

Save ffdf data.frames in a directory

ffdfwith

Evaluate an expression in a ffdf data environment

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

ffdfdply

Performs a split-apply-combine on an ffdf

binned_sumsq

Fast squared summing in different bins

byMean

Fast conditional mean

chunkify

Chunkify an element-wise function

bySum

Fast conditional sum