Package: zoo 1.8-16
Achim Zeileis
zoo: 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.
Authors:
zoo_1.8-16.tar.gz
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manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
zoo/json (API)
| # Install 'zoo' in R: |
| install.packages('zoo', repos = c('https://r-forge.r-universe.dev', 'https://cloud.r-project.org')) |
Bug tracker:https://r-forge.r-project.org/projects/zoo
Last updated from:ed940e9291. Checks:13 OK. Indexed: yes.
| Target | Result | Time | Files | Syslog |
|---|---|---|---|---|
| linux-devel-arm64 | OK | 158 | ||
| linux-devel-x86_64 | OK | 172 | ||
| source / vignettes | OK | 264 | ||
| linux-release-arm64 | OK | 168 | ||
| linux-release-x86_64 | OK | 149 | ||
| macos-release-arm64 | OK | 106 | ||
| macos-release-x86_64 | OK | 476 | ||
| macos-oldrel-arm64 | OK | 135 | ||
| macos-oldrel-x86_64 | OK | 338 | ||
| windows-devel | OK | 100 | ||
| windows-release | OK | 136 | ||
| windows-oldrel | OK | 97 | ||
| wasm-release | OK | 215 |
Exports:as.Dateas.Date.numericas.Date.tsas.Date.yearmonas.Date.yearqtras.yearmonas.yearmon.defaultas.yearqtras.yearqtr.defaultas.zooas.zoo.defaultas.zooregas.zooreg.defaultautoplot.zoocbind.zoocoredatacoredata.defaultcoredata<-facet_freeformat.yearqtrfortify.zoofrequency<-ifelse.zooindexindex<-index2charis.regularis.zoomake.par.listMATCHMATCH.defaultMATCH.timesmedian.zoomerge.zoona.aggregatena.aggregate.defaultna.approxna.approx.defaultna.fillna.fill.defaultna.fill0na.locfna.locf.defaultna.locf0na.splinena.spline.defaultna.StructTSna.trimna.trim.defaultna.trim.tsORDERORDER.defaultpanel.lines.itspanel.lines.tispanel.lines.tspanel.lines.zoopanel.plot.custompanel.plot.defaultpanel.points.itspanel.points.tispanel.points.tspanel.points.zoopanel.polygon.itspanel.polygon.tispanel.polygon.tspanel.polygon.zoopanel.rect.itspanel.rect.tispanel.rect.tspanel.rect.zoopanel.segments.itspanel.segments.tispanel.segments.tspanel.segments.zoopanel.text.itspanel.text.tispanel.text.tspanel.text.zooplot.zooquantile.zoorbind.zooread.csv.zooread.csv2.zooread.delim.zooread.delim2.zooread.table.zooread.zoorev.zoorollapplyrollapplyrrollmaxrollmax.defaultrollmaxrrollmeanrollmean.defaultrollmeanrrollmedianrollmedian.defaultrollmedianrrollsumrollsum.defaultrollsumrscale_type.yearmonscale_type.yearqtrscale_x_yearmonscale_x_yearqtrscale_y_yearmonscale_y_yearqtrSys.yearmonSys.yearqtrtime<-tinyplot.zoowrite.zooxblocksxblocks.defaultxtfrm.zooyearmonyearmon_transyearqtryearqtr_transzoozooreg
Dependencies:lattice
zoo Design
Last update: 2026-02-15
Started: 2012-04-28
zoo FAQ
1. I know that duplicate times are not allowed but my data has them. What do I do? | 2. When I try to specify a log axis to plot.zoo a warning is issued. What is wrong? | 3. How do I create right and a left vertical axes in plot.zoo? | 4. I have data frame with both numeric and factor columns. How do I convert that to a "zoo" object? | 5. Why does lag give slightly different results on a "zoo" and a "zooreg" series which are otherwise the same? | 6. How do I subtract the mean of each month from a "zoo" series? | 7. How do I create a monthly series but still keep track of the dates? | 8. How are axes added to a plot created using plot.zoo? | 9. Why is nothing plotted except axes when I plot an object with many NAs? | 10. Does zoo work with Rmetrics? | 11. What other packages use zoo? | 12. Why does ifelse not work as I expect? | 13. In a series which is regular except for a few missing times or for which we wish to align to a grid how is it filled in or aligned? | 14. What is the difference between as.Date in zoo and as.Date in the core of R? | 15. How can I speed up zoo?
Last update: 2026-02-15
Started: 2012-04-28
Reading Data in zoo
Last update: 2025-04-09
Started: 2012-04-28
zoo Quick Reference
Read a series from a text file | Query dates | Convert back into a plain matrix | Union and intersection | Visualization | Select (a few) observations | Handle missing data | Prices and returns | Query Yahoo! Finance | Summaries
Last update: 2025-04-08
Started: 2012-04-28
zoo: An S3 Class and Methods for Indexed Totally Ordered Observations
Introduction | The class "zoo" and its methods | Combining zoo with other packages | Summary and outlook | Reference card
Last update: 2025-04-08
Started: 2012-04-28
Readme and manuals
Help Manual
| Help page | Topics |
|---|---|
| Compute Summary Statistics of zoo Objects | aggregate.zoo split.zoo |
| Coercion from and to zoo | as.data.frame.zoo as.list.ts as.list.zoo as.matrix.zoo as.ts.zoo as.vector.zoo as.zoo as.zoo.data.frame as.zoo.default as.zoo.fts as.zoo.irts as.zoo.its as.zoo.matrix as.zoo.mcmc as.zoo.tis as.zoo.ts as.zoo.xts as.zoo.zoo |
| Extracting/Replacing the Core Data of Objects | coredata coredata.default coredata.irts coredata.its coredata.ts coredata.zoo coredata<- coredata<-.irts coredata<-.its coredata<-.ts coredata<-.zoo |
| Replacing the Index of Objects | frequency<- frequency<-.zoo frequency<-.zooreg |
| Convenience Functions for Plotting zoo Objects with ggplot2 | autoplot.zoo facet_free fortify.zoo ggplot2.zoo scale_type.yearmon scale_type.yearqtr scale_x_yearmon scale_x_yearqtr scale_y_yearmon scale_y_yearqtr yearmon_trans yearqtr_trans |
| Extracting/Replacing the Index of Objects | end.zoo index index.default index.ts index.zoo index<- index<-.zoo start.zoo time.zoo time<- time<-.zoo |
| Check Regularity of a Series | is.regular is.regular.default is.regular.ts is.regular.zoo is.regular.zooreg |
| Lags and Differences of zoo Objects | diff.zoo lag.zoo |
| Make a List from a Parameter Specification | make.par.list |
| Value Matching | MATCH MATCH.Date MATCH.default MATCH.POSIXct MATCH.POSIXlt MATCH.timeDate MATCH.times |
| Merge Two or More zoo Objects | c.zoo cbind.zoo merge.zoo rbind.zoo |
| Replace NA by Aggregation | na.aggregate na.aggregate.default |
| Replace NA by Interpolation | na.approx na.approx.default na.approx.ts na.approx.zoo na.approx.zooreg na.spline na.spline.default na.spline.ts na.spline.zoo na.spline.zooreg |
| Fill NA or specified positions. | na.fill na.fill.default na.fill.ts na.fill.zoo na.fill0 |
| Last Observation Carried Forward | na.locf na.locf.data.frame na.locf.default na.locf.list na.locf0 |
| Fill NA or specified positions. | na.StructTS na.StructTS.ts na.StructTS.zoo |
| Trim Leading/Trailing Missing Observations | na.trim na.trim.default na.trim.ts |
| Ordering Permutation | ORDER ORDER.default |
| Plotting zoo Objects | barplot.zoo boxplot.zoo lines.zoo plot.zoo points.zoo |
| Reading and Writing zoo Series | read.csv.zoo read.csv2.zoo read.delim.zoo read.delim2.zoo read.table.zoo read.zoo write.zoo |
| Apply Rolling Functions | rollapply rollapply.default rollapply.ts rollapply.zoo rollapplyr |
| Rolling Means/Maximums/Medians/Sums | rollmax rollmax.default rollmax.ts rollmax.zoo rollmaxr rollmean rollmean.default rollmean.ts rollmean.zoo rollmeanr rollmedian rollmedian.default rollmedian.ts rollmedian.zoo rollmedianr rollsum rollsum.default rollsum.ts rollsum.zoo rollsumr |
| Plotting zoo Objects with tinyplot | tinyplot.zoo |
| Extract/Replacing the Time Windows of Objects | window.zoo window<-.zoo |
| Plot contiguous blocks along x axis. | xblocks xblocks.default xblocks.ts xblocks.zoo |
| Plot zoo Series with Lattice | llines.its llines.tis llines.zoo lpoints.its lpoints.tis lpoints.zoo ltext.its ltext.tis ltext.zoo panel.lines.its panel.lines.tis panel.lines.ts panel.lines.zoo panel.plot.custom panel.plot.default panel.points.its panel.points.tis panel.points.ts panel.points.zoo panel.polygon.its panel.polygon.tis panel.polygon.ts panel.polygon.zoo panel.rect.its panel.rect.tis panel.rect.ts panel.rect.zoo panel.segments.its panel.segments.tis panel.segments.ts panel.segments.zoo panel.text.its panel.text.tis panel.text.ts panel.text.zoo xyplot.its xyplot.tis xyplot.zoo |
| An Index Class for Monthly Data | -.yearmon as.character.yearmon as.data.frame.yearmon as.Date as.Date.numeric as.Date.ts as.Date.yearmon as.list.yearmon as.numeric.yearmon as.POSIXct.yearmon as.POSIXlt.yearmon as.yearmon as.yearmon.character as.yearmon.Date as.yearmon.date as.yearmon.dates as.yearmon.default as.yearmon.factor as.yearmon.integer as.yearmon.jul as.yearmon.numeric as.yearmon.POSIXt as.yearmon.timeDate c.yearmon cycle.yearmon format.yearmon is.numeric.yearmon MATCH.yearmon mean.yearmon Ops.yearmon print.yearmon range.yearmon Summary.yearmon summary.yearmon Sys.yearmon unique.yearmon xtfrm.yearmon yearmon [.yearmon [[.yearmon |
| An Index Class for Quarterly Data | -.yearqtr as.character.yearqtr as.data.frame.yearqtr as.Date.yearqtr as.list.yearqtr as.numeric.yearqtr as.POSIXct.yearqtr as.POSIXlt.yearqtr as.yearqtr as.yearqtr.character as.yearqtr.Date as.yearqtr.date as.yearqtr.dates as.yearqtr.default as.yearqtr.factor as.yearqtr.integer as.yearqtr.jul as.yearqtr.numeric as.yearqtr.POSIXt as.yearqtr.timeDate as.yearqtr.yearqtr c.yearqtr cycle.yearqtr format.yearqtr is.numeric.yearqtr MATCH.yearqtr mean.yearqtr Ops.yearqtr print.yearqtr range.yearqtr Summary.yearqtr summary.yearqtr Sys.yearqtr unique.yearqtr xtfrm.yearqtr yearqtr [.yearqtr [[.yearqtr |
| Z's Ordered Observations | $.zoo $<-.zoo as.zoo.factor cummax.zoo cummin.zoo cumprod.zoo cumsum.zoo dim<-.zoo head.zoo ifelse.zoo index2char index2char.default index2char.numeric index2char.POSIXt is.zoo mean.zoo median.zoo na.contiguous na.contiguous.data.frame na.contiguous.default na.contiguous.list na.contiguous.zoo names.zoo names<-.zoo Ops.zoo print.zoo quantile.zoo range.zoo rev.zoo scale.zoo str.zoo subset.zoo summary.zoo t.zoo tail.zoo transform.zoo with.zoo xtfrm.zoo zoo [.zoo [<-.zoo |
| Regular zoo Series | as.ts.zooreg as.zoo.zooreg as.zooreg as.zooreg.default as.zooreg.its as.zooreg.ts as.zooreg.xts as.zooreg.zoo cycle.zoo cycle.zooreg deltat.zoo deltat.zooreg frequency.zoo frequency.zooreg index<-.zooreg lag.zooreg time<-.zooreg zooreg |
