ctmaEqual function

ctmaEqual

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.

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

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

Returns

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.

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)
## Not run:

CoTiMAFullInv23Fit_6$activeDirectory <- "/Users/tmp/" # adapt!
CoTiMAFullInvEq23Fit_6 <- ctmaEqual(ctmaInvariantFit=CoTiMAFullInv23Fit_6)
## End(Not run)