Subsetting "sts" Objects
The [-method extracts parts of an
"sts" object
using row (time) and column (unit) indices.
## S4 method for signature 'sts' x[i, j, ..., drop]
x |
an object of class |
i |
row index (integer or logical vector). |
j |
column index (character, integer, or logical vector). |
...,drop |
unused (arguments of the generic). |
Row indices are used to select a subset of the original time period.
The start and epoch slots of the time series are
adjusted accordingly.
A warning is issued if an irregular integer sequence is used to
extract rows, e.g., x[c(1,2,4),], which could destroy the
structure of the time series (freq).
Column indices work as usual when indexing matrices,
so may select units by name, position or a vector of booleans.
When subsetting columns, population fractions are recomputed if and
only if x is no multinomialTS and already contains
population fractions.
NA indices are not supported, negative indices are.
Note that a [<- method (i.e., subassignment) is not implemented.
an object of class "sts".
data("ha.sts")
haagg <- aggregate(ha.sts, nfreq=13)
plot(haagg[, 3]) # Single series
plot(haagg[1:30, 3]) # Somewhat shorter
#Counts at time 20
plot(haagg[20, ], type = observed ~ unit)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.