zoo (version 0.1-2)

merge.zoo: Merge Two or More zoo Objects

Description

Merge two zoo objects by common indexes (times), or do other versions of database "join" operations.

Usage

## S3 method for class 'zoo':
merge(x, y, \dots, all = TRUE)

Arguments

x, y, ...

two or more objects of class "zoo".

all

logical vector of the same length as the number of "zoo" objects which should be merged (otherwise expanded). All indexes (times) of the objects corresponding to TRUE are included, for those corresponding to FALSE only the indexes

Value

• An object of class "zoo".

Details

The indexes of different "zoo" objects can be of different classes and are coerced to one class in the resulting object (with a warning).

See Also

zoo

Examples

x.date <- as.POSIXct(paste("2003-02-", c(1, 3, 7, 9, 14), sep = ""))
x <- zoo(rnorm(5), x.date)

y1 <- zoo(matrix(1:10, ncol = 2), 1:5)
y2 <- zoo(matrix(rnorm(10), ncol = 2), 3:7)

merge(y1, y2, all = FALSE)
merge(x, y1, y2, all = TRUE)