varioGram.asreml {asreml} | R Documentation

## Empirical variogram constructor.

### Description

Calculate the empirical variogram from an `asreml` object.

### Usage

    ## S3 method for class 'asreml'
    varioGram(
      object,
      type = "default",
      spatial = "trend",
      formula = ~NULL,
      composite = TRUE,
      model = c("empirical"),
      metric = c("euclidean", "manhattan"),
      angle = 0,
      angle.tol = 180,
      nlag = 20,
      maxdist = 0.5,
      xlag = NA,
      lag.tol = 0.5,
      grid = TRUE,
      ...
    )

### Arguments

`object` | An object of class `asreml`.
`type` | Type of residuals, see `residuals.asreml`.
`spatial` | Whether to include a nugget effect; see `residuals.asreml`.
`formula` | An optional model formula designed to extract residuals from the random component of the model rather than the residual component. This is a two sided formula where the response is a pattern in the style required by the `pattern` argument of `coef.asreml`.
`composite` | The argument to `asr_varioGram`.
`model` | The argument to `asr_varioGram`.
`metric` | The argument to `asr_varioGram`.
`angle` | The argument to `asr_varioGram`.
`angle.tol` | The argument to `asr_varioGram`.
`nlag` | The argument to `asr_varioGram`.
`maxdist` | The argument to `asr_varioGram`.
`xlag` | The argument to `asr_varioGram`.
`lag.tol` | The argument to `asr_varioGram`.
`grid` | The argument to `asr_varioGram`.
`...` | Additional arguments.

### Details

Calls `asr_varioGram` to calculate the empirical semi-variogram.

### Value

A data frame including the following components:

x

  The original x coordinates.

y

  The original y coordinates.

gamma

  The variogram estimate.

distance

  The average distance for pairs in the lag.

np

  The number of pairs in the lag.

angle

  Direction if not a regular grid.

### See Also

`asr_varioGram`

### Examples

    ## Not run:
    data(barley)
    shf.asr <- asreml(yield ~ Variety, residual = ~ ar1(Row):ar1(Column),
                      data=shf)
    varioGram(shf.asr)

    ## End(Not run)

[Package asreml version 4.1.0.176 Index]