Transform to draws objects

Try to transform an R object to a format supported by the posterior package.

Usage

as_draws(x, ...)

is_draws(x)

Arguments

x

(draws) A draws object or another R object for which the method is defined.

...

Arguments passed to individual methods (if applicable).

Value

If possible, a draws object in the closest supported format to x. The formats are linked to in the See Also section below.

Details

The class "draws" is the parent class of all supported formats, which also have their own subclasses of the form "draws_{format}" (e.g. "draws_array").

See also

Other formats: draws_array(), draws_df(), draws_list(), draws_matrix(), draws_rvars()

Examples

# create some random draws
x <- matrix(rnorm(30), nrow = 10)
colnames(x) <- c("a", "b", "c")
str(x)
#>  num [1:10, 1:3] -0.963 -0.814 -0.195 1.916 0.702 ...
#>  - attr(*, "dimnames")=List of 2
#>   ..$ : NULL
#>   ..$ : chr [1:3] "a" "b" "c"

# transform to a draws object
y <- as_draws(x)
str(y)
#>  'draws_matrix' num [1:10, 1:3] -0.963 -0.814 -0.195 1.916 0.702 ...
#>  - attr(*, "dimnames")=List of 2
#>   ..$ draw    : chr [1:10] "1" "2" "3" "4" ...
#>   ..$ variable: chr [1:3] "a" "b" "c"
#>  - attr(*, "nchains")= int 1

# remove the draws classes from the object
class(y) <- class(y)[-(1:2)]
str(y)
#>  num [1:10, 1:3] -0.963 -0.814 -0.195 1.916 0.702 ...
#>  - attr(*, "dimnames")=List of 2
#>   ..$ draw    : chr [1:10] "1" "2" "3" "4" ...
#>   ..$ variable: chr [1:3] "a" "b" "c"
#>  - attr(*, "nchains")= int 1