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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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Install
install.packages('ffbase')
Monthly Downloads
254
Version
0.12.7
License
GPL-3
Issues
20
Pull Requests
0
Stars
35
Forks
15
Repository
http://github.com/edwindj/ffbase
Maintainer
Edwin Jonge
Last Published
November 6th, 2018
Functions in ffbase (0.12.7)
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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