ffbase

Summary methods for ff objects

Summary methods for ff objects

Date Conversion Functions for ff vector

Character Vectors

Trivial implementation, but very handy

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

Bounded memory linear regression

Fast summing in different bins

Fast squared summing in different bins

Fast tabulating in different bins

Fast conditional mean

Fast conditional sum

Concatenate ff vectors

Chunk an expression

Chunkify an element-wise function

Compact a ff vector or ffdf data frame

Fast conditional mean

Fast conditional sum

Cumulative Sums, Products, and Extremes

Convert Numeric ff vector to factor ff

Lagged Differences

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

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

Duplicated for ff and ffdf objects

Create a ffdf from All Combinations of Factors

Arithmetic Operators for ff vectors

Math for ff vectors

Ops for ff vectors

Append a ff vector to another ff vector

Basic statistical functions for ff

Append a dataframe or an ffdf to another ffdf

Performs a split-apply-combine on an ffdf

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

Evaluate an expression in a ffdf data environment

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

Reading and writing data.frames (ffdf)

Conditional Element Selection for ff vectors.

Value Matching for ff objects

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

Generate ff vector with draws from distribution

Replicate Elements of ff vectors.

Sequence Generation of ff vectors.

Sequence Generation of ff vectors.

Create an index from a filter statement

Date Conversion Functions for ff vector

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

hist for ff vectors

compute and plot 2 dimensional histogram of ff data

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

'Not Available' / Missing Values for ff vectors

Use LaF to import data into ffdf data.frame

Loads ffdf data.frames from a directory

Mean of ff vector

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

Minimum, maximum and range of ff vector

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

Packs ffdf data.frames into a compressed file

Save a ffdf data.frame in directory

quantiles

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

Save ffdf data.frames in a directory

sets the logging of ffbase

Subsetting a ff vector or ffdfdata frame

Sum of ff vector Elements

Cross Tabulation and Table Creation

Tabulation for ff vectors

Transform a ffdf data.frame

Unique values for ff and ffdf objects

Unpacks previously stored ffdf data.frame into a directory

Evaluate an expression in a ffdf data environment

Evaluate an expression in a ffdf data environment