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ffbase (version 0.12.7)

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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Version

Install

install.packages('ffbase')

Monthly Downloads

67

Version

0.12.7

License

GPL-3

Issues

20

Pull Requests

0

Stars

35

Forks

15

Maintainer

Edwin Jonge

Last Published

November 6th, 2018

Functions in ffbase (0.12.7)

byMean

Fast conditional mean
as.Date.ff_vector

Date Conversion Functions for ff vector
bigglm.ffdf

Bounded memory linear regression
c.ff

Concatenate ff vectors
binned_sum

Fast summing in different bins
chunkexpr

Chunk an expression
binned_tabulate

Fast tabulating in different bins
any.ff

Summary methods for ff objects
bySum

Fast conditional sum
as.ffdf.ffdf

Trivial implementation, but very handy
condMean

Fast conditional mean
as.character.ff

Character Vectors
compact

Compact a ff vector or ffdf data frame
addfforder

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

Chunkify an element-wise function
cumsum.ff

Cumulative Sums, Products, and Extremes
expand.ffgrid

Create a ffdf from All Combinations of Factors
ffrandom

Generate ff vector with draws from distribution
+.ff_vector

Arithmetic Operators for ff vectors
cut.ff

Convert Numeric ff vector to factor ff
ffappend

Append a ff vector to another ff vector
[.ff

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

Fast conditional sum
as.ram.ffdf

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

Use LaF to import data into ffdf data.frame
ffbase-package

Basic statistical functions for ff
abs.ff_vector

Math for ff vectors
ffdfappend

Append a dataframe or an ffdf to another ffdf
diff.ff

Lagged Differences
droplevels.ffdf

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

Duplicated for ff and ffdf objects
ffdfdply

Performs a split-apply-combine on an ffdf
droplevels.ff

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

Ops for ff vectors
ffifelse

Conditional Element Selection for ff vectors.
[.ffdf

Reading and writing data.frames (ffdf)
hist.ff

hist for ff vectors
hist2d.ff

compute and plot 2 dimensional histogram of ff data
ffmatch

Value Matching for ff objects
ikey

Creates a unique integer key for unique combinations of rows of an ffdf
format.ff_vector

Date Conversion Functions for ff vector
pack.ffdf

Packs ffdf data.frames into a compressed file
ffdfrbind.fill

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

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

'Not Available' / Missing Values for ff vectors
mean.ff

Mean of ff vector
ffdfwith

Evaluate an expression in a ffdf data environment
load.ffdf

Loads ffdf data.frames from a directory
merge.ffdf

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

Replicate Elements of ff vectors.
ffseq_len

Sequence Generation of ff vectors.
subset.ff

Subsetting a ff vector or ffdfdata frame
sum.ff

Sum of ff vector Elements
unpack.ffdf

Unpacks previously stored ffdf data.frame into a directory
with.ffdf

Evaluate an expression in a ffdf data environment
ffdfsave

Save a ffdf data.frame in directory
ffwhich

Create an index from a filter statement
save.ffdf

Save ffdf data.frames in a directory
within.ffdf

Evaluate an expression in a ffdf data environment
set_ffbase_logging

sets the logging of ffbase
min.ff

Minimum, maximum and range of ff vector
table

Cross Tabulation and Table Creation
ffseq

Sequence Generation of ff vectors.
move.ffdf

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

Transform a ffdf data.frame
unique.ff

Unique values for ff and ffdf objects
quantile.ff

quantiles
rle_ff

Compute the lengths and values of runs of equal values in a vector
tabulate.ff

Tabulation for ff vectors
all.ff

Summary methods for ff objects
binned_sumsq

Fast squared summing in different bins