Merge two time-indexed series using either the levels or the first differences of the second series where the series overlap.
mergeSeries(x, y, differences = FALSE, naLoses = FALSE)
tis
objects, or objects that can sensibly be coerced to
tis
by as.tis
.
if TRUE
, the first differences of series are merged, and then
cumulatively summed. The default is FALSE
.
if TRUE
, NA
values in y
do not overwrite
corresponding values in x
.
A tis
object series with start and end dates that span those of
x
and y
. Where the series overlap, values from y
are used, except that if naLoses
is TRUE
, NA
values from y
do not overwrite non-NA
values in x
.
x
and y
must have the same tif
(ti frequency),
and the same number of column (if they are multivariate).