# zoo v1.7-8

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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 | |

zoo | Z's Ordered Observations | |

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

ORDER | Ordering Permutation | |

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

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

xblocks | Plot contiguous blocks along x axis. | |

MATCH | Value Matching | |

na.approx | Replace NA by Interpolation | |

zooreg | Regular zoo Series | |

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

as.zoo | Coercion from and to zoo | |

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

is.regular | Check Regularity of a Series | |

yearqtr | An Index Class for Quarterly Data | |

na.aggregate | Replace NA by Aggregation | |

plot.zoo | Plotting zoo Objects | |

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

rollmean | Rolling Means/Maximums/Medians | |

rollapply | Apply Rolling Functions | |

xyplot.zoo | Plot zoo Series with Lattice | |

na.locf | Last Observation Carried Forward | |

read.zoo | Reading and Writing zoo Series | |

index | Extracting/Replacing the Index of Objects | |

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

yearmon | An Index Class for Monthly Data | |

frequency<- | Replacing the Index of Objects | |

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

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

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## Last month downloads

## Details

Date | 2012-10-05 |

License | GPL-2 |

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

Packaged | 2012-10-06 16:16:30 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2012-10-06 16:23:09 |

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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