Extracting/Replacing the Core Data of Objects

Generic functions for extracting the core data contained in a (more complex) object and replacing it.

coredata(x, ...)
coredata(x) <- value

Arguments

x

an object.

...

further arguments passed to methods.

value

a suitable value object for use with x.

Value

In zoo, there are currently coredata methods for time series objects of class "zoo", "ts", "its", "irts", all of which strip off the index/time attributes and return only the observations. The are also corresponding replacement methods for these classes.

See also

zoo

Examples

suppressWarnings(RNGversion("3.5.0"))
set.seed(1)

x.date <- as.Date(paste(2003, rep(1:4, 4:1), seq(1,20,2), sep = "-"))
x <- zoo(matrix(rnorm(20), ncol = 2), x.date)

## the full time series
x
#>                                  
#> 2003-01-01 -0.6264538  1.51178117
#> 2003-01-03  0.1836433  0.38984324
#> 2003-01-05 -0.8356286 -0.62124058
#> 2003-01-07  1.5952808 -2.21469989
#> 2003-02-09  0.3295078  1.12493092
#> 2003-02-11 -0.8204684 -0.04493361
#> 2003-02-13  0.4874291 -0.01619026
#> 2003-03-15  0.7383247  0.94383621
#> 2003-03-17  0.5757814  0.82122120
#> 2003-04-19 -0.3053884  0.59390132
## and only matrix of observations
coredata(x)
#>             [,1]        [,2]
#>  [1,] -0.6264538  1.51178117
#>  [2,]  0.1836433  0.38984324
#>  [3,] -0.8356286 -0.62124058
#>  [4,]  1.5952808 -2.21469989
#>  [5,]  0.3295078  1.12493092
#>  [6,] -0.8204684 -0.04493361
#>  [7,]  0.4874291 -0.01619026
#>  [8,]  0.7383247  0.94383621
#>  [9,]  0.5757814  0.82122120
#> [10,] -0.3053884  0.59390132

## change the observations
coredata(x) <- matrix(1:20, ncol = 2)
x
#>                 
#> 2003-01-01  1 11
#> 2003-01-03  2 12
#> 2003-01-05  3 13
#> 2003-01-07  4 14
#> 2003-02-09  5 15
#> 2003-02-11  6 16
#> 2003-02-13  7 17
#> 2003-03-15  8 18
#> 2003-03-17  9 19
#> 2003-04-19 10 20