# zoo v1.7-2

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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 | |

rollmean | Rolling Means/Maximums/Medians | |

rollapply | Apply Rolling Functions | |

xblocks | Plot contiguous blocks along x axis. | |

is.regular | Check Regularity of a Series | |

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

frequency<- | Replacing the Index of Objects | |

index | Extracting/Replacing the Index of Objects | |

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

MATCH | Value Matching | |

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

yearmon | An Index Class for Monthly Data | |

na.locf | Last Observation Carried Forward | |

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

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

na.aggregate | Replace NA by Aggregation | |

as.zoo | Coercion from and to zoo | |

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

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

read.zoo | Reading and Writing zoo Series | |

na.approx | Replace NA by Interpolation | |

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

zooreg | Regular zoo Series | |

xyplot.zoo | Plot zoo Series with Lattice | |

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

ORDER | Ordering Permutation | |

plot.zoo | Plotting zoo Objects | |

yearqtr | An Index Class for Quarterly Data | |

zoo | Z's Ordered Observations | |

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## Last month downloads

## Details

Date | 2011-07-23 |

License | GPL-2 |

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

Packaged | 2011-07-23 11:19:18 UTC; zeileis |

Repository | CRAN |

Date/Publication | 2011-07-23 12:28:05 |

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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