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 arguments must be conformable (same dimensions) and their time-stamps must match for each row.
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"
, conformable with the
inputs, and with identical time-stamps.
Giles Heywood
ts
,
POSIXct
,
itsFile
,
itsLags
itsJoin
itsTimes
itsSubset
itsFin
itsDisp
itsInfo
itsCumdif
itsInterp
b <- newIts(1:30,ncol=3) b+b-2*b b/b b%*%diag(ncol(b)) its(b%*%diag(ncol(b)))