###### 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. |