MATCH                   Value Matching
ORDER                   Ordering Permutation
aggregate.zoo           Compute Summary Statistics of zoo Objects
as.Date.numeric         Date Conversion Functions from Numeric, Integer
                        and ts Objects
as.zoo                  Coercion from and to zoo
coredata                Extracting/Replacing the Core Data of Objects
frequency<-             Replacing the Index of Objects
index                   Extracting/Replacing the Index of Objects
is.regular              Check Regularity of a Series
lag.zoo                 Lags and Differences of zoo Objects
merge.zoo               Merge Two or More zoo Objects
na.approx               Replace NA by Interpolation
na.locf                 Last Observation Carried Forward
na.trim                 Trim Leading/Trailing Missing Observations
plot.zoo                Plotting zoo Objects
rapply                  Apply Rolling Functions
read.zoo                Read zoo Series via read.table
rollmean                Rolling Means/Maximums/Medians
window.zoo              Extract/Replacing the Time Windows of Objects
yearmon                 An Index Class for Monthly Data
yearqtr                 An Index Class for Quaterly Data
zoo                     Z's Ordered Observations
zooreg                  Regular zoo Series
