# zoo v1.7-1

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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 | |

rollapply | Apply Rolling Functions | |

index | Extracting/Replacing the Index of Objects | |

MATCH | Value Matching | |

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

zooreg | Regular zoo Series | |

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

ggplot2.zoo | Convenience Functions for Plotting zoo Objects with ggplot2 | |

frequency<- | Replacing the Index of Objects | |

is.regular | Check Regularity of a Series | |

na.aggregate | Replace NA by Aggregation | |

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

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

na.locf | Last Observation Carried Forward | |

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

ORDER | Ordering Permutation | |

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

xblocks | Plot contiguous blocks along x axis. | |

rollmean | Rolling Means/Maximums/Medians | |

na.approx | Replace NA by Interpolation | |

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

xyplot.zoo | Plot zoo Series with Lattice | |

yearqtr | An Index Class for Quarterly Data | |

plot.zoo | Plotting zoo Objects | |

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

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

yearmon | An Index Class for Monthly Data | |

as.zoo | Coercion from and to zoo | |

zoo | Z's Ordered Observations | |

read.zoo | Reading and Writing zoo Series | |

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## Last month downloads

## Details

Date | 2011-07-18 |

License | GPL-2 |

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

Packaged | 2011-07-18 09:20:50 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2011-07-18 09:44:08 |

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

suggests | chron , coda , DAAG , fCalendar , fSeries , fts , its , 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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