# zoo v1.7-12

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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 | |

as.zoo | Coercion from and to zoo | |

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

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

rollapply | Apply Rolling Functions | |

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

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

index | Extracting/Replacing the Index of Objects | |

na.approx | Replace NA by Interpolation | |

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

ORDER | Ordering Permutation | |

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

na.aggregate | Replace NA by Aggregation | |

MATCH | Value Matching | |

xblocks | Plot contiguous blocks along x axis. | |

xyplot.zoo | Plot zoo Series with Lattice | |

zoo | Z's Ordered Observations | |

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

na.locf | Last Observation Carried Forward | |

yearqtr | An Index Class for Quarterly Data | |

yearmon | An Index Class for Monthly Data | |

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

plot.zoo | Plotting zoo Objects | |

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

read.zoo | Reading and Writing zoo Series | |

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

is.regular | Check Regularity of a Series | |

rollmean | Rolling Means/Maximums/Medians/Sums | |

zooreg | Regular zoo Series | |

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## Last month downloads

## Details

Date | 2015-03-16 |

License | GPL-2 | GPL-3 |

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

Packaged | 2015-03-16 13:27:04 UTC; zeileis |

NeedsCompilation | yes |

Repository | CRAN |

Date/Publication | 2015-03-16 19:13:58 |

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

suggests | chron , coda , DAAG , fts , ggplot2 , its , mondate , scales , strucchange , timeDate , timeSeries , tis , tseries , xts |

imports | graphics , grDevices , lattice (>= 0.20-27) , utils |

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

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