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zoo (version 1.7-4)

S3 Infrastructure for Regular and Irregular Time Series (Z's ordered observations)

Description

An S3 class with methods for totally ordered indexed observations. It is particularly aimed at irregular time series of numeric vectors/matrices and factors. zoo's key design goals are independence of a particular index/date/time class and consistency with ts and base R by providing methods to extend standard generics.

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Version

Install

install.packages('zoo')

Monthly Downloads

562,997

Version

1.7-4

License

GPL-2

Maintainer

Achim Zeileis

Last Published

August 22nd, 2011

Functions in zoo (1.7-4)

na.StructTS

Fill NA or specified positions.
aggregate.zoo

Compute Summary Statistics of zoo Objects
na.trim

Trim Leading/Trailing Missing Observations
is.regular

Check Regularity of a Series
coredata

Extracting/Replacing the Core Data of Objects
lag.zoo

Lags and Differences of zoo Objects
rollapply

Apply Rolling Functions
yearmon

An Index Class for Monthly Data
window.zoo

Extract/Replacing the Time Windows of Objects
na.fill

Fill NA or specified positions.
plot.zoo

Plotting zoo Objects
as.zoo

Coercion from and to zoo
zooreg

Regular zoo Series
xyplot.zoo

Plot zoo Series with Lattice
zoo

Z's Ordered Observations
MATCH

Value Matching
frequency<-

Replacing the Index of Objects
index

Extracting/Replacing the Index of Objects
na.locf

Last Observation Carried Forward
na.approx

Replace NA by Interpolation
na.aggregate

Replace NA by Aggregation
yearqtr

An Index Class for Quarterly Data
make.par.list

Make a List from a Parameter Specification
read.zoo

Reading and Writing zoo Series
xblocks

Plot contiguous blocks along x axis.
rollmean

Rolling Means/Maximums/Medians
ORDER

Ordering Permutation
merge.zoo

Merge Two or More zoo Objects