Add new quantity to shinystan object — generate_quantity • shinystan

Add to shinystan object a new parameter as a function of one or two existing parameters.

Usage

generate_quantity(sso, param1, param2, fun, new_name)

Arguments

sso: A shinystan object.
param1: Name of first parameter as character string.
param2: Optional. Name of second parameter as character string.
fun: Function to call, i.e. function(param1) or function(param1,param2). See Examples, below.
new_name: Name for the new parameter as character string.

Value

sso, updated. See Examples.

See also

drop_parameters to remove parameters from a shinystan object.

Examples

# Using example shinystan object 'eight_schools'
sso <- eight_schools
sso <- generate_quantity(sso, fun = function(x) x^2, 
                         param1 = "tau", new_name = "tau_sq")
sso <- generate_quantity(sso, fun = "-", 
                         param1 = "theta[1]", param2 = "theta[2]", 
                         new_name = "theta1minus2")