tar_jags_example_data {jagstargets}

Simulate example JAGS data.

Description

An example dataset compatible with the model file from tar_jags_example_file(). The output has a .join_data element so the true value of beta from the simulation is automatically appended to the beta rows of the summary output.

Usage

tar_jags_example_data(n = 10L)

Arguments

n

Integer of length 1, number of data points.

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_jags_rep_summary(). Contains the regression coefficient beta (numeric of length 1) and prior predictive data y (numeric vector).

Details

The tar_jags_example_data() function draws a JAGS dataset from the prior predictive distribution of the model from tar_jags_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.

Value

List, dataset compatible with the model file from tar_jags_example_file(). The output has a .join_data element so the true value of beta from the simulation is automatically appended to the beta rows of the summary output.

Examples

tar_jags_example_data()