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zoo (version 1.8-15)

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

697,379

Version

1.8-15

License

GPL-2 | GPL-3

Maintainer

Achim Zeileis

Last Published

December 15th, 2025

Functions in zoo (1.8-15)

na.locf

Last Observation Carried Forward
na.StructTS

Fill NA or specified positions.
read.zoo

Reading and Writing zoo Series
na.aggregate

Replace NA by Aggregation
make.par.list

Make a List from a Parameter Specification
plot.zoo

Plotting zoo Objects
merge.zoo

Merge Two or More zoo Objects
na.trim

Trim Leading/Trailing Missing Observations
na.fill

Fill NA or specified positions.
na.approx

Replace NA by Interpolation
window.zoo

Extract/Replacing the Time Windows of Objects
yearmon

An Index Class for Monthly Data
rollmean

Rolling Means/Maximums/Medians/Sums
yearqtr

An Index Class for Quarterly Data
tinyplot.zoo

Plotting zoo Objects with tinyplot
zooreg

Regular zoo Series
rollapply

Apply Rolling Functions
xblocks

Plot contiguous blocks along x axis.
zoo

Z's Ordered Observations
xyplot.zoo

Plot zoo Series with Lattice
ORDER

Ordering Permutation
ggplot2.zoo

Convenience Functions for Plotting zoo Objects with ggplot2
as.zoo

Coercion from and to zoo
coredata

Extracting/Replacing the Core Data of Objects
index

Extracting/Replacing the Index of Objects
MATCH

Value Matching
frequency<-

Replacing the Index of Objects
lag.zoo

Lags and Differences of zoo Objects
aggregate.zoo

Compute Summary Statistics of zoo Objects
is.regular

Check Regularity of a Series