vpredict {asreml} | R Documentation |
Form functions of variance components from an asreml
object.
vpredict(object, xform)
object |
An |
xform |
A two-sided formula, where the left-hand side labels the estimate.
The right-hand side defines the derived parameter as an algebraic
expression. Any of the estimated parameters can be included,
represented as |
The standard error of the computed value is calculated using the
delta method using deriv()
, which calculates
algebraic derivatives for a wide range of expressions. The variance
components are represented in the expression by "V1"
,
"V2"
, "V3"
, etc.
A single-row data frame with components:
The result of the algebraic expression.
The estimated standard error.