zoo (version 1.7-13)

as.zoo: Coercion from and to zoo

Description

Methods for coercing "zoo" objects to other classes and a generic function as.zoo for coercing objects to class "zoo".

Usage

as.zoo(x, ...)

Arguments

x

an object,

...

further arguments passed to zoo when the return object is created.

Value

as.zoo returns a zoo object.

Details

as.zoo currently has a default method and methods for ts, its, fts, irts, mcmc, tis, xts 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).

In the conversion between zoo and ts, the zooreg class is always used.

See Also

zoo, zooreg, ts, its, irts, tis, fts, mcmc, xts.

Examples

## 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)