Simulate example data for tar_stan_example_file().

An example dataset compatible with the model file from tar_stan_example_file().

Usage

tar_stan_example_data(n = 10L)

Format

A list with the following elements:

• n: integer, number of data points.

• x: numeric, covariate vector.

• y: numeric, response variable.

• true_beta: numeric of length 1, value of the regression coefficient beta used in simulation.

• .join_data: a list of simulated values to be appended to as a .join_data column in the output of targets generated by functions such as tar_stan_mcmc_rep_summary(). Contains the regression coefficient beta (numeric of length 1) and prior predictive data y (numeric vector).

Arguments

n

Integer of length 1, number of data points.

Value

List, dataset compatible with the model file from tar_stan_example_file().

Details

The tar_stan_example_data() function draws a Stan dataset from the prior predictive distribution of the model from tar_stan_example_file(). First, the regression coefficient beta is drawn from its standard normal prior, and the covariate x is computed. Then, conditional on the beta draws and the covariate, the response vector y is drawn from its Normal(x * beta, 1) likelihood.

See also

Other examples: tar_stan_example_file()

Examples

tar_stan_example_data()
#> $n
#> [1] 10
#> 
#> $x
#>  [1] -1.0000000 -0.7777778 -0.5555556 -0.3333333 -0.1111111  0.1111111
#>  [7]  0.3333333  0.5555556  0.7777778  1.0000000
#> 
#> $y
#>  [1]  2.43169232  2.51720220  2.50244695 -1.00939646  0.02348177 -0.51500667
#>  [7] -1.09512665 -1.90773472 -1.26666743 -0.37223872
#> 
#> $true_beta
#> [1] -2.437264
#> 
#> $.join_data
#> $.join_data$beta
#> [1] -2.437264
#> 
#> $.join_data$y_rep
#>  [1]  2.43169232  2.51720220  2.50244695 -1.00939646  0.02348177 -0.51500667
#>  [7] -1.09512665 -1.90773472 -1.26666743 -0.37223872
#> 
#>