as.zoo {zoo} | R Documentation |
Methods for coercing "zoo"
objects to other classes and
a generic function as.zoo
for coercing objects to class "zoo"
.
as.zoo(x, ...)
x |
an object, |
... |
further arguments passed to zoo when the return
object is created. |
as.zoo
currently has a default method and methods
for ts
, its
and irts
objects
(and zoo
objects themselves).
Methods for coercing objects of class "zoo"
to other classes
currently include: as.ts
, as.matrix
, as.vector
,
as.data.frame
, as.list
(the latter also being available
for "ts"
objects). Furthermore the coercion function
as.its.zoo
is provided, but works only
if the corresponding package is attached.
In the conversion between zoo
and ts
, the zooreg
class is
always used.
as.zoo
returns a zoo
object.
## coercion to zoo: ## default method as.zoo(rnorm(5)) ## method for "ts" objects as.zoo(ts(rnorm(5), start = 1981, freq = 12)) ## coercion from zoo: x.date <- as.POSIXct(paste("2003-", rep(1:4, 4:1), "-", sample(1:28, 10, replace = TRUE), sep = "")) x <- zoo(matrix(rnorm(24), ncol = 2), x.date) as.matrix(x) as.vector(x) as.data.frame(x) as.list(x)