The as_draws_matrix() methods convert
objects to the draws_matrix format.
The draws_matrix() function creates an object of the
draws_matrix format based on a set of numeric vectors.
See Details.
as_draws_matrix(x, ...)
# S3 method for default
as_draws_matrix(x, ...)
# S3 method for draws_matrix
as_draws_matrix(x, ...)
# S3 method for draws_array
as_draws_matrix(x, ...)
# S3 method for draws_df
as_draws_matrix(x, ...)
# S3 method for draws_list
as_draws_matrix(x, ...)
# S3 method for draws_rvars
as_draws_matrix(x, ...)
# S3 method for mcmc
as_draws_matrix(x, ...)
# S3 method for mcmc.list
as_draws_matrix(x, ...)
draws_matrix(..., .nchains = 1)
is_draws_matrix(x)An object to convert to a draws_matrix object.
For as_draws_matrix():
Arguments passed to individual methods (if applicable).
For draws_matrix(): Named
arguments containing numeric vectors each defining a separate variable.
(positive integer) The number of chains. The default is 1.
A draws_matrix object, which has classes
c("draws_matrix", "draws", "matrix").
Objects of class "draws_matrix" are matrices (2-D arrays) with
dimensions "draw" and "variable". See Examples.
Other formats:
draws_array(),
draws_df(),
draws_list(),
draws_rvars(),
draws
x1 <- as_draws_matrix(example_draws())
class(x1)
#> [1] "draws_matrix" "draws" "matrix"
print(x1)
#> # A draws_matrix: 100 iterations, 4 chains, and 10 variables
#> variable
#> draw mu tau theta[1] theta[2] theta[3] theta[4] theta[5] theta[6]
#> 1 2.01 2.8 3.96 0.271 -0.74 2.1 0.923 1.7
#> 2 1.46 7.0 0.12 -0.069 0.95 7.3 -0.062 11.3
#> 3 5.81 9.7 21.25 14.931 1.83 1.4 0.531 7.2
#> 4 6.85 4.8 14.70 8.586 2.67 4.4 4.758 8.1
#> 5 1.81 2.8 5.96 1.156 3.11 2.0 0.769 4.7
#> 6 3.84 4.1 5.76 9.909 -1.00 5.3 5.889 -1.7
#> 7 5.47 4.0 4.03 4.151 10.15 6.6 3.741 -2.2
#> 8 1.20 1.5 -0.28 1.846 0.47 4.3 1.467 3.3
#> 9 0.15 3.9 1.81 0.661 0.86 4.5 -1.025 1.1
#> 10 7.17 1.8 6.08 8.102 7.68 5.6 7.106 8.5
#> # ... with 390 more draws, and 2 more variables
str(x1)
#> 'draws_matrix' num [1:400, 1:10] 2.01 1.46 5.81 6.85 1.81 ...
#> - attr(*, "dimnames")=List of 2
#> ..$ draw : chr [1:400] "1" "2" "3" "4" ...
#> ..$ variable: chr [1:10] "mu" "tau" "theta[1]" "theta[2]" ...
#> - attr(*, "nchains")= int 4
x2 <- draws_matrix(a = rnorm(10), b = rnorm(10), c = 1)
class(x2)
#> [1] "draws_matrix" "draws" "matrix"
print(x2)
#> # A draws_matrix: 10 iterations, 1 chains, and 3 variables
#> variable
#> draw a b c
#> 1 1.63 0.22 1
#> 2 0.43 -0.72 1
#> 3 -1.76 1.56 1
#> 4 0.94 -0.24 1
#> 5 1.57 0.63 1
#> 6 0.46 0.18 1
#> 7 0.71 -0.95 1
#> 8 -1.28 1.01 1
#> 9 1.87 0.08 1
#> 10 -0.15 1.05 1
str(x2)
#> 'draws_matrix' num [1:10, 1:3] 1.625 0.434 -1.765 0.936 1.571 ...
#> - attr(*, "dimnames")=List of 2
#> ..$ draw : chr [1:10] "1" "2" "3" "4" ...
#> ..$ variable: chr [1:3] "a" "b" "c"
#> - attr(*, "nchains")= int 1