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ffbase (version 0.13.1)

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

106

Version

0.13.1

License

GPL-3

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Repository

https://github.com/edwindj/ffbase

Maintainer

Edwin Jonge

Last Published

August 25th, 2020

Functions in ffbase (0.13.1)

any.ff

Summary methods for ff objects

as.character.ff

Character Vectors

binned_sum

Fast summing in different bins

binned_sumsq

Fast squared summing in different bins

as.Date.ff_vector

Date Conversion Functions for ff vector

bigglm.ffdf

Bounded memory linear regression

all.ff

Summary methods for ff objects

as.ffdf.ffdf

Trivial implementation, but very handy

binned_tabulate

Fast tabulating in different bins

chunkify

Chunkify an element-wise function

as.ram.ffdf

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

ffwhich

Create an index from a filter statement

droplevels.ff

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

[.ffdf

Reading and writing data.frames (ffdf)

diff.ff

Lagged Differences

[.ff

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

ffseq_len

Sequence Generation of ff vectors.

within.ffdf

Evaluate an expression in a ffdf data environment

with.ffdf

Evaluate an expression in a ffdf data environment

unpack.ffdf

Unpacks previously stored ffdf data.frame into a directory

cumsum.ff

Cumulative Sums, Products, and Extremes

cut.ff

Convert Numeric ff vector to factor ff

bySum

Fast conditional sum

byMean

Fast conditional mean

quantile.ff

quantiles

addfforder

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

hist.ff

hist for ff vectors

ffrandom

Generate ff vector with draws from distribution

rle_ff

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

hist2d.ff

compute and plot 2 dimensional histogram of ff data

transform.ffdf

Transform a ffdf data.frame

ffappend

Append a ff vector to another ff vector

compact

Compact a ff vector or ffdf data frame

condMean

Fast conditional mean

unique.ff

Unique values for ff and ffdf objects

c.ff

Concatenate ff vectors

mean.ff

Mean of ff vector

ffdfappend

Append a dataframe or an ffdf to another ffdf

ffdfdply

Performs a split-apply-combine on an ffdf

table

Cross Tabulation and Table Creation

tabulate.ff

Tabulation for ff vectors

ffbase-package

Basic statistical functions for ff

merge.ffdf

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

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

ffdfwith

Evaluate an expression in a ffdf data environment

grouprunningcumsum

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

format.ff_vector

Date Conversion Functions for ff vector

load.ffdf

Loads ffdf data.frames from a directory

laf_to_ffdf

Use LaF to import data into ffdf data.frame

save.ffdf

Save ffdf data.frames in a directory

set_ffbase_logging

sets the logging of ffbase

expand.ffgrid

Create a ffdf from All Combinations of Factors

droplevels.ffdf

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

+.ff_vector

Arithmetic Operators for ff vectors

ffifelse

Conditional Element Selection for ff vectors.

duplicated.ff

Duplicated for ff and ffdf objects

ffmatch

Value Matching for ff objects

ffrep.int

Replicate Elements of ff vectors.

is.na.ff

'Not Available' / Missing Values for ff vectors

ffdfsave

Save a ffdf data.frame in directory

subset.ff

Subsetting a ff vector or ffdfdata frame

ikey

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

pack.ffdf

Packs ffdf data.frames into a compressed file

sum.ff

Sum of ff vector Elements

ffseq

Sequence Generation of ff vectors.

min.ff

Minimum, maximum and range of ff vector

move.ffdf

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