# zoo v1.7-6

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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 | |

frequency<- | Replacing the Index of Objects | |

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

rollapply | Apply Rolling Functions | |

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

MATCH | Value Matching | |

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

xblocks | Plot contiguous blocks along x axis. | |

zoo | Z's Ordered Observations | |

plot.zoo | Plotting zoo Objects | |

zooreg | Regular zoo Series | |

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

as.zoo | Coercion from and to zoo | |

na.approx | Replace NA by Interpolation | |

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

is.regular | Check Regularity of a Series | |

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

index | Extracting/Replacing the Index of Objects | |

yearmon | An Index Class for Monthly Data | |

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

ORDER | Ordering Permutation | |

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

rollmean | Rolling Means/Maximums/Medians | |

na.locf | Last Observation Carried Forward | |

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

yearqtr | An Index Class for Quarterly Data | |

na.aggregate | Replace NA by Aggregation | |

read.zoo | Reading and Writing zoo Series | |

xyplot.zoo | Plot zoo Series with Lattice | |

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## Last month downloads

## Details

Date | 2011-11-02 |

License | GPL-2 |

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

Packaged | 2011-11-02 18:29:46 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2011-11-02 18:40:09 |

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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