ojaMedianControl {OjaNP} | R Documentation |
Tuning parameters for the algorithms used by function ojaMedian.
ojaMedianControl(sigmaInit = 0, sigmaAda = 20, adaFactor = 0.5, iter = 1e+06, useAllSubsets = FALSE, nSubsetsUsed = 1000, sigmaLog10Dec = 10, storeSubDet = TRUE, eps = 0.1, chi2 = 0.95, samples = 20, maxlines = 1000, S1 = cov, S2 = cov4, S1args = list(), S2args = list())
sigmaInit |
(for the evo algorithm): Set the initial variance of the mutation vector in the first run. |
sigmaAda |
(for the evo algorithm): Defines after how many mutations the variance of the mutation vector is adjusted. |
adaFactor |
(for the evo algorithm): Defines the level of adjustment of the mutation vector. |
iter |
(for the evo algorithm): The maximum number of iterations. If the algorithm does not converge, it stops after iter - iterations. |
useAllSubsets |
(for the evo algorithm): A logical flag. If it is set all datapoints and resulting simplices are taken into account for the calculation. |
nSubsetsUsed |
(for the evo algorithm): If useAllSubsets is not set, this determines how many, randomly selected, datapoints are taken into account. |
sigmaLog10Dec |
(for the evo algorithm): This is an abort criterion. If the logarithmised initial variance differs more than sigmaLog10Dec from the actual, logarithmised variance, the algorithm stops. |
storeSubDet |
(for the evo algorithm): A boolean flag. If it is set subdeterminants are stored. This should always been set to TRUE if 6*(dim -1)*nSubsetsUsed<CPU-Cache. |
eps |
(for the grid algorithm): This is the abort criterion. If the grid becomes denser than this threshold the algorithm stops. |
chi2 |
(for the grid algorithm): This is the test niveau of the test, if a grid point could be used as a Oja-Median or not. |
samples |
(for the grid algorithm): This determines how many additional hyperplanes are taken after every run. |
maxlines |
(for the exact algorithm): This determines how many intersection lines are investigated in addtion to the one with the steepest gradient. |
S1 |
(for the evo and grid algorithms): Passed on to ics to compute the invariant coordinate system. Default is cov . |
S2 |
(for the evo and grid algorithms): Passed on to ics to compute the invariant coordinate system. Default is cov4 . |
S1args |
(for the evo and grid algorithms): Optional arguments for S1 passed on to ics to compute the invariant coordinate system. |
S2args |
(for the evo and grid algorithms): Optional arguments for S2 passed on to ics to compute the invariant coordinate system. |
Daniel Fischer and Klaus Nordhausen
ojaMedian
, also for references and examples.
## Show the default settings: str(ojaMedianControl())