| itsJoin {its} | R Documentation |
Join functions for objects of class "its".
union(x,y) intersect(x,y) alignedIts(obj1,obj2,print=FALSE) appendIts(obj1,obj2,but=TRUE,matchnames=TRUE) collapseIts(x)
x, y |
an object of class "its" or NULL |
obj1,obj2 |
object of class "its" |
print |
logical flag to display summary information |
but |
logical flag controls whether overlap is disallowed |
matchnames |
logical flag controls whether names must match |
union has a number of time values (rows) which is determined by the union
of the time-stamps of the two inputs. The number of columns is the sum of the
number of columns of the two inputs.
intersect has a number of time values (rows) which is determined by the
intersect of the time-stamps of the two inputs. The number of columns is the sum
of the number of columns of the two inputs.
alignedIts selects the rows from two inputs which have identical time-stamps.
appendIts appends one object to the other, removing overlapping data from the
later object, optionally checking that the column names match. Overlapping data
must match.
collapseIts checks for columns with the same names, using dimnames(x)[[2]].
columns with the same names are required to have the same numeric values in each row, but are
allowed NAs. The numeric data is combined, and the resulting object has unique
column names - this will in general result in a reduction in the number of columns.
For union, intersect, appendIts an object of class "its".
For alignedIts, a list of two objects of class "its"
Giles Heywood
ts,
POSIXct,
itsFile,
itsLags,
itsJoin,
itsTimes,
itsSubset,
itsFin,
itsDisp,
itsInfo,
itsCumdif,
itsArith
itsInterp
its.format("%Y-%m-%d")
b <- newIts(1:30,ncol=3,start="2003-01-01",end="2003-01-10")
union(b,diff(b))
intersect(b,diff(b))
alignedIts(b,diff(b))
b1 <- newIts(1:30,ncol=3,start="2003-01-11",end="2003-01-20")
appendIts(b,b1)
c <- union(b,b*NA)
c[2,4] <- 99
c[2,1] <- NA
print(c)
collapseIts(c)