timetools (for r-cran)

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This package is intended to manipulate irregular time series such as subtime
series, series based on time intervals, heterogeneous time series (hourly time
series and monthly time series at the same time for instance), etc.

This package uses (and extends) only POSIXt* format for time objects.

Main things defined in this package are the classes POSIXcti, POSIXctp,
TimeIntervalDataFrame, TimeInstantDataFrame, SubtimeDataFrame, methods to
switch from one class to another and the changeSupport method for
TimeIntervalDataFrame.

Available on CRAN (http://cran.r-project.org/web/packages/timetools/index.html)