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zoo (version 1.5-0)

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 with ts and base R by providing methods to extend standard generics.

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Version

Install

install.packages('zoo')

Monthly Downloads

821,957

Version

1.5-0

License

GPL-2

Maintainer

Achim Zeileis

Last Published

December 15th, 2025

Functions in zoo (1.5-0)

make.par.list

Make a List from a Parameter Specification
rollmean

Rolling Means/Maximums/Medians
na.locf

Last Observation Carried Forward
read.zoo

Reading and Writing zoo Series
window.zoo

Extract/Replacing the Time Windows of Objects
index

Extracting/Replacing the Index of Objects
na.trim

Trim Leading/Trailing Missing Observations
xyplot.zoo

Plot zoo Series with Lattice
zooreg

Regular zoo Series
coredata

Extracting/Replacing the Core Data of Objects
yearmon

An Index Class for Monthly Data
as.zoo

Coercion from and to zoo
aggregate.zoo

Compute Summary Statistics of zoo Objects
merge.zoo

Merge Two or More zoo Objects
yearqtr

An Index Class for Quarterly Data
rollapply

Apply Rolling Functions
na.approx

Replace NA by Interpolation
as.Date.numeric

Date Conversion Functions from Numeric, Integer and ts Objects
is.regular

Check Regularity of a Series
ORDER

Ordering Permutation
zoo

Z's Ordered Observations
plot.zoo

Plotting zoo Objects
lag.zoo

Lags and Differences of zoo Objects
frequency<-

Replacing the Index of Objects
MATCH

Value Matching