its-arith {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
,
its-file
,
its-lags
its-join
its-times
its-subset
its-fin
its-disp
its-info
its-cumdif
a <- matrix(c(seq(by=24*60*60,length=20),1:20,41:60),nrow=20,ncol=3) b <- as.its(a) b+b-2*b b/b b its(b