Bivariate lognormal response family

biv_lognormal() defines an exact two-response lognormal distribution. Its rho12 is the residual correlation on the log-response scale, not a raw-response correlation and not the frozen-margin association eta.

Usage

biv_lognormal()

Value

A drm_family object.

Examples

biv_lognormal()
#> $name
#> [1] "biv_lognormal"
#> 
#> $family
#> [1] "biv_lognormal"
#> 
#> $n_response
#> [1] 2
#> 
#> $dpars
#> [1] "mu1"    "mu2"    "sigma1" "sigma2" "rho12" 
#> 
#> $links
#>             mu1             mu2          sigma1          sigma2           rho12 
#>      "identity"      "identity"           "log"           "log" "atanh_guarded" 
#> 
#> attr(,"class")
#> [1] "drm_family"