CoTiMA (version 0.7.0)

ctmaEqual: ctmaEqual

Description

test if the two or more invariant drift parameters in the CoTiMAFit object supplied are equal. The supplied CoTiMA fit-object (ctmaInvariantFit) has to be a model fitted with ctmaFit where at least two parameters were set invariant across primary studies (e.g., 2 cross effects). All parameters that are set invariant in the supplied model are then constrained to be equal by ctmaEqual (no user action required), the model is fitted, and a log-liklihood ratio test is performed informing about the probability that equality applies.

Usage

ctmaEqual(
  ctmaInvariantFit = NULL,
  activeDirectory = NULL,
  activateRPB = FALSE,
  digits = 4,
  coresToUse = 2
)

Value

returns a model where two or more parameters were set equal across primary studies and a log-likelihood difference test informing about the probability that the equality assumption is correct.

Arguments

ctmaInvariantFit

object to which a CoTiMA fit has been assigned to (i.e., what has been returned by ctmaFit). In most cases probably a model in which (only) two effects were specified with invariantDrift.

activeDirectory

defines another active directory than the one used in ctmaInvariantFit

activateRPB

set to TRUE to receive push messages with CoTiMA notifications on your phone

digits

Number of digits used for rounding (in outputs)

coresToUse

If neg., the value is subtracted from available cores, else value = cores to use

Examples

# Fit a CoTiMA with a set of parameters set equal that were set
# invariant in a previous model (of which the fit object is
# supplied in argument ctmaInvariantFit)
if (FALSE) {
CoTiMAFullInv23Fit_6$activeDirectory <- "/Users/tmp/" # adapt!
CoTiMAFullInvEq23Fit_6 <- ctmaEqual(ctmaInvariantFit=CoTiMAFullInv23Fit_6)
}