# zoo v1.7-7

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## 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.trim | Trim Leading/Trailing Missing Observations | |

na.StructTS | Fill NA or specified positions. | |

zooreg | Regular zoo Series | |

as.zoo | Coercion from and to zoo | |

ORDER | Ordering Permutation | |

window.zoo | Extract/Replacing the Time Windows of Objects | |

index | Extracting/Replacing the Index of Objects | |

frequency<- | Replacing the Index of Objects | |

na.aggregate | Replace NA by Aggregation | |

na.fill | Fill NA or specified positions. | |

plot.zoo | Plotting zoo Objects | |

aggregate.zoo | Compute Summary Statistics of zoo Objects | |

na.approx | Replace NA by Interpolation | |

is.regular | Check Regularity of a Series | |

rollapply | Apply Rolling Functions | |

coredata | Extracting/Replacing the Core Data of Objects | |

read.zoo | Reading and Writing zoo Series | |

na.locf | Last Observation Carried Forward | |

MATCH | Value Matching | |

make.par.list | Make a List from a Parameter Specification | |

yearqtr | An Index Class for Quarterly Data | |

zoo | Z's Ordered Observations | |

yearmon | An Index Class for Monthly Data | |

lag.zoo | Lags and Differences of zoo Objects | |

xblocks | Plot contiguous blocks along x axis. | |

merge.zoo | Merge Two or More zoo Objects | |

rollmean | Rolling Means/Maximums/Medians | |

xyplot.zoo | Plot zoo Series with Lattice | |

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## Last month downloads

## Details

Date | 2012-02-12 |

License | GPL-2 |

URL | http://zoo.R-Forge.R-project.org/ |

Packaged | 2012-02-11 01:25:59 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2012-02-11 01:33:00 |

depends | base (>= 2.10.0) , R (>= 2.10.0) , stats |

suggests | chron , coda , DAAG , fts , its , mondate , strucchange , timeDate , timeSeries , tis , tseries , xts |

imports | graphics , grDevices , lattice (>= 0.18-1) , utils |

Contributors | Achim Zeileis, Felix Andrews, G. Grothendieck, Jeffrey Ryan |

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