# zoo v1.7-3

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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 | |

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

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

plot.zoo | Plotting zoo Objects | |

na.locf | Last Observation Carried Forward | |

rollmean | Rolling Means/Maximums/Medians | |

zooreg | Regular zoo Series | |

na.approx | Replace NA by Interpolation | |

yearmon | An Index Class for Monthly Data | |

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

as.zoo | Coercion from and to zoo | |

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

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

rollapply | Apply Rolling Functions | |

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

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

zoo | Z's Ordered Observations | |

read.zoo | Reading and Writing zoo Series | |

frequency<- | Replacing the Index of Objects | |

ORDER | Ordering Permutation | |

is.regular | Check Regularity of a Series | |

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

xyplot.zoo | Plot zoo Series with Lattice | |

yearqtr | An Index Class for Quarterly Data | |

xblocks | Plot contiguous blocks along x axis. | |

na.aggregate | Replace NA by Aggregation | |

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

MATCH | Value Matching | |

index | Extracting/Replacing the Index of Objects | |

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## Last month downloads

## Details

Date | 2011-08-11 |

License | GPL-2 |

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

Packaged | 2011-08-11 12:21:12 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2011-08-11 13:21:12 |

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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