gRim (version 0.3.4)

test-edges: Test edges in graphical models with p-value/AIC value

Description

Test edges in graphical models with p-value/AIC value. The models must be iModels.

Usage

testEdges(
  object,
  edgeMAT = NULL,
  ingraph = TRUE,
  criterion = "aic",
  k = 2,
  alpha = NULL,
  headlong = FALSE,
  details = 1,
  ...
)
testInEdges(
  object,
  edgeMAT = NULL,
  criterion = "aic",
  k = 2,
  alpha = NULL,
  headlong = FALSE,
  details = 1,
  ...
)
testOutEdges(
  object,
  edgeMAT = NULL,
  criterion = "aic",
  k = 2,
  alpha = NULL,
  headlong = FALSE,
  details = 1,
  ...
)

Value

A dataframe with test statistics (p-value or change in AIC), edges and logical telling if the edge can be deleted.

Arguments

object

An iModel model object

edgeMAT

A p * 2 matrix with edges

ingraph

If TRUE, edges in graph are tested; if FALSE, edges not in graph are tested.

criterion

Either "aic" or "test" (for significance test)

k

Penalty term when criterion="aic". Only k=2 gives genuine AIC.

alpha

Critical value for deeming an edge to be significant/ insignificant. When criterion="aic", alpha defaults to 0; when criterion="test", alpha defaults to 0.05.

headlong

If TRUE then testing will stop once a model improvement has been found.

details

Controls the level of printing on the screen.

...

Further arguments to be passed on to testdelete (for testInEdges) and testadd (for testOutEdges).

Author

Søren Højsgaard,

Details

• testIn: Function which tests whether each edge in "edgeList" can be delete from model "object"

• testOut: Is similar but in the other direction.

See Also

getEdges, testadd, testdelete

Examples

data(math)
cm1 <- cmod(~me:ve + ve:al + al:an, data=math)
testEdges(cm1, ingraph=TRUE)
testEdges(cm1, ingraph=FALSE)
## Same as
# testInEdges(cm1)
# testOutEdges(cm)