Description
vpredict: Form functions of variance components from an asreml object.
Usage
vpredict(object, xform)
Arguments
object |
An asreml object. |
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 "V1", "V2", "V3", … in the order they appear in object$vparameters. Parentheses, and simple functions like X are allowed. |
Details
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.
Value
| A single-row data frame with components: | |
| Estimate | The result of the algebraic expression. |
| SE | The estimated standard error. |