itsArith {its} | R Documentation |
Arithmetic methods for objects of class "its"
.
x + y x - y x * y x / y x ^ y x x
x,y |
an object of class "its" |
The arithmetic operators return numeric vectors containing the result of the element-by-element operations. The dates of the arguments are matched and the intersection of the dates is returned.
Note that the matrix multiplication operator,
and the result of a matrix multiplication is a matrix, not an "its"
.
The resulting matrix can be converted back to its using the function its()
- see examples.
The returned object is an object of class "its"
, having the same number
of columns as the two arguments, however, the number of rows will be the length
of the intersection of the dates of the two arguments.
Giles Heywood
ts
,
POSIXct
,
itsFile
,
itsLags
itsJoin
itsTimes
itsSubset
itsFin
itsDisp
itsInfo
itsCumdif
itsInterp
b <- newIts(1:30,ncol=3) c <- newIts(1:10,ncol=3)[1:5,] b+c b+b-2*b b/b b%*%diag(ncol(b)) its(b%*%diag(ncol(b)))