zoo v1.7-5


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by Achim Zeileis

S3 Infrastructure for Regular and Irregular Time Series (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 ts and base R by providing methods to extend standard generics.

Functions in zoo

Name Description
na.approx Replace NA by Interpolation
na.fill Fill NA or specified positions.
as.zoo Coercion from and to zoo
merge.zoo Merge Two or More zoo Objects
plot.zoo Plotting zoo Objects
na.trim Trim Leading/Trailing Missing Observations
index Extracting/Replacing the Index of Objects
ORDER Ordering Permutation
yearmon An Index Class for Monthly Data
window.zoo Extract/Replacing the Time Windows of Objects
read.zoo Reading and Writing zoo Series
is.regular Check Regularity of a Series
rollapply Apply Rolling Functions
na.StructTS Fill NA or specified positions.
zoo Z's Ordered Observations
MATCH Value Matching
xyplot.zoo Plot zoo Series with Lattice
coredata Extracting/Replacing the Core Data of Objects
aggregate.zoo Compute Summary Statistics of zoo Objects
zooreg Regular zoo Series
lag.zoo Lags and Differences of zoo Objects
frequency<- Replacing the Index of Objects
na.aggregate Replace NA by Aggregation
yearqtr An Index Class for Quarterly Data
na.locf Last Observation Carried Forward
make.par.list Make a List from a Parameter Specification
rollmean Rolling Means/Maximums/Medians
xblocks Plot contiguous blocks along x axis.
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