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.

Copy Link

Version

Install

install.packages('ffbase')

Monthly Downloads

106

Version

0.13.3

License

GPL-3

Issues

Pull Requests

Stars

Forks

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