Add new quantity to shinystan object

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

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")
#> 
#> This might take a moment for large shinystan objects...
sso <- generate_quantity(sso, fun = "-", 
                         param1 = "theta[1]", param2 = "theta[2]", 
                         new_name = "theta1minus2")
#> 
#> This might take a moment for large shinystan objects...