zoo v1.0-2


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by Achim Zeileis

Z's ordered observations

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.

Functions in zoo

Name Description
rapply Apply Rolling Functions
frequency<- Replacing the Index of Objects
as.zoo Coercion from and to zoo
yearqtr An Index Class for Quaterly Data
aggregate.zoo Compute Summary Statistics of zoo Objects
lag.zoo Lags and Differences of zoo Objects
rollmean Rolling Means/Maximums/Medians
read.zoo Read zoo Series via read.table
ORDER Ordering Permutation
coredata Extracting/Replacing the Core Data of Objects
yearmon An Index Class for Monthly Data
na.approx Replace NA by Interpolation
zooreg Regular zoo Series
MATCH Value Matching
window.zoo Extract/Replacing the Time Windows of Objects
merge.zoo Merge Two or More zoo Objects
index Extracting/Replacing the Index of Objects
as.Date.numeric Date Conversion Functions from Numeric, Integer and ts Objects
na.locf Last Observation Carried Forward
is.regular Check Regularity of a Series
plot.zoo Plotting zoo Objects
zoo Z's Ordered Observations
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Date 2005-09-07
License GPL
Packaged Thu Sep 8 13:07:59 2005; zeileis

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