| standardized_to_direct {pedmod} | R Documentation |
Transform Between Parameterizations
Description
Transform the parameters between the parameterizations that are used in the package.
Usage
standardized_to_direct(par, n_scales, jacobian = FALSE)
direct_to_standardized(par, n_scales)
Arguments
par |
concatenated vector with the fixed effect slopes and the scale parameters that should be transformed. |
n_scales |
integer with the number of scale parameters. |
jacobian |
logical indicating if the Jacobian matrix of transformation should be computed. |
Value
standardized_to_direct:
returns the parameters using the direct parameterizations. See
vignette("pedmod", package = "pedmod") for the definition. There is
an attribute called 'variance proportions' with the proportion of variance
of each effect assuming that all the scale matrices are correlation matrices.
There is an attribute called jacobian with the Jacobian matrix if
jacobian is TRUE.
direct_to_standardized:
the parameters using the standardized parameterizations. See
vignette("pedmod", package = "pedmod") for the definition.
Examples
# transform backwards and forwards
set.seed(1)
smp <- runif(10, -1, 1)
res <- standardized_to_direct(smp, 2L, jacobian = TRUE)
back_val <- direct_to_standardized(res, 2L)
all.equal(smp, back_val, check.attributes = FALSE)
res