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zoo (version 1.1-0)

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

562,997

Version

1.1-0

License

GPL

Maintainer

Achim Zeileis

Last Published

April 10th, 2025

Functions in zoo (1.1-0)

index

Extracting/Replacing the Index of Objects
coredata

Extracting/Replacing the Core Data of Objects
as.Date.numeric

Date Conversion Functions from Numeric, Integer and ts Objects
as.zoo

Coercion from and to zoo
ORDER

Ordering Permutation
aggregate.zoo

Compute Summary Statistics of zoo Objects
plot.zoo

Plotting zoo Objects
rapply

Apply Rolling Functions
MATCH

Value Matching
na.trim

Trim Leading/Trailing Missing Observations
na.approx

Replace NA by Interpolation
is.regular

Check Regularity of a Series
yearqtr

An Index Class for Quaterly Data
zooreg

Regular zoo Series
lag.zoo

Lags and Differences of zoo Objects
yearmon

An Index Class for Monthly Data
merge.zoo

Merge Two or More zoo Objects
frequency<-

Replacing the Index of Objects
read.zoo

Read zoo Series via read.table
zoo

Z's Ordered Observations
window.zoo

Extract/Replacing the Time Windows of Objects
na.locf

Last Observation Carried Forward
rollmean

Rolling Means/Maximums/Medians