# zoo v1.7-5

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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 | |

na.approx | Replace NA by Interpolation | |

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

as.zoo | Coercion from and to zoo | |

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

plot.zoo | Plotting zoo Objects | |

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

index | Extracting/Replacing the Index of Objects | |

ORDER | Ordering Permutation | |

yearmon | An Index Class for Monthly Data | |

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

read.zoo | Reading and Writing zoo Series | |

is.regular | Check Regularity of a Series | |

rollapply | Apply Rolling Functions | |

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

zoo | Z's Ordered Observations | |

MATCH | Value Matching | |

xyplot.zoo | Plot zoo Series with Lattice | |

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

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

zooreg | Regular zoo Series | |

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

frequency<- | Replacing the Index of Objects | |

na.aggregate | Replace NA by Aggregation | |

yearqtr | An Index Class for Quarterly Data | |

na.locf | Last Observation Carried Forward | |

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

rollmean | Rolling Means/Maximums/Medians | |

xblocks | Plot contiguous blocks along x axis. | |

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## Last month downloads

## Details

Date | 2011-10-25 |

License | GPL-2 |

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

Packaged | 2011-10-24 17:13:55 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2011-10-25 06:15:19 |

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

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