its-cumdif {its} | R Documentation |
Cumulation, differencing for objects of class "its"
.
cumsum
and diff
perform the cumulative sum and difference of each
column in turn. In diff
, the first lag
rows are discarded.
An object of class "its"
cumsum(x) diff(x,lag=1)
"its"
Giles Heywood
ts
,
POSIXct
,
its-file
,
its-lags
its-join
its-times
its-subset
its-fin
its-disp
its-info
its-cumdif
its-arith
a <- matrix(c(seq(by=24*60*60,length=20),1:20,41:60),nrow=20,ncol=3) b <- as.its(a) cumsum(b) diff(b,lag=2)