biv_gaussian() defines a two-response Gaussian distribution with formulas
for both locations, both residual standard deviations, and residual
correlation rho12. The residual-correlation link is recorded as
"atanh_guarded" because fitted response-scale correlations use
rho12 = 0.99999999 * tanh(eta_rho12).
Examples
biv_gaussian()
#> $name
#> [1] "biv_gaussian"
#>
#> $family
#> [1] "biv_gaussian"
#>
#> $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"