zoo v1.4-2
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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 | |
| as.zoo | Coercion from and to zoo | |
| lag.zoo | Lags and Differences of zoo Objects | |
| rollapply | Apply Rolling Functions | |
| make.par.list | Make a List from a Parameter Specification | |
| frequency<- | Replacing the Index of Objects | |
| index | Extracting/Replacing the Index of Objects | |
| is.regular | Check Regularity of a Series | |
| na.trim | Trim Leading/Trailing Missing Observations | |
| rollmean | Rolling Means/Maximums/Medians | |
| as.Date.numeric | Date Conversion Functions from Numeric, Integer and ts Objects | |
| window.zoo | Extract/Replacing the Time Windows of Objects | |
| aggregate.zoo | Compute Summary Statistics of zoo Objects | |
| yearmon | An Index Class for Monthly Data | |
| zooreg | Regular zoo Series | |
| coredata | Extracting/Replacing the Core Data of Objects | |
| yearqtr | An Index Class for Quarterly Data | |
| merge.zoo | Merge Two or More zoo Objects | |
| MATCH | Value Matching | |
| plot.zoo | Plotting zoo Objects | |
| na.approx | Replace NA by Interpolation | |
| read.zoo | Reading and Writing zoo Series | |
| na.locf | Last Observation Carried Forward | |
| ORDER | Ordering Permutation | |
| xyplot.zoo | Plot zoo Series with Lattice | |
| zoo | Z's Ordered Observations | |
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Details
| Date | 2008-01-28 |
| LazyLoad | yes |
| License | GPL |
| URL | http://R-Forge.R-project.org/projects/zoo/ |
| Packaged | Mon Jan 28 10:40:26 2008; zeileis |
| depends | base (>= 2.4.1) , R (>= 2.4.1) , stats |
| suggests | chron , DAAG , fCalendar , its , strucchange , tseries , xts |
| imports | graphics , grDevices , lattice , utils |
| Contributors | Achim Zeileis, Gabor Grothendieck |
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