ts objects into a single time-series. It does
it by taking the mean (meadian, fun) of the common elements for each time.
est.union(collection, fun = mean, return.matrix=FALSE)Catalog.
Catalog object with an additional member called union of
class ts that contains the union of all stations described in collection.
If return.matrix is true, then
it returns a matrix time stamped where each collumn is a station data.
est.* family members:
est.rm,
est.sort,
est.cut,
est.fill.