sum
for time-series objects
tssum(series, months = 1:12, max.na.fraction = 0.3, safe.check = FALSE)
"ts"
object meses
"ts"
of frequency length(meses)
with the accumulated sum over the months defined in meses
.
diffmonths
,
diasdelmes
,
m12
,
time2ym
,
ym2time
,
xts2ts
.