repairConditionsDistanceMatrix {CEGO}

Repair Conditions of a Distance Matrix

Description

This function repairs distance matrices, so that the following two properties are ensured: The distance values should be non-zero and the diagonal should be zero. Other properties (conditionally negative semi-definitene (CNSD), symmetric) are assumed to be given.

Usage

repairConditionsDistanceMatrix(mat)

Arguments

mat

symmetric, CNSD distance matrix. If your matrix is not CNSD, use correctionCNSD first. Or use correctionDistanceMatrix.

Value

repaired distance matrix

References

Martin Zaefferer and Thomas Bartz-Beielstein. (2016). Efficient Global Optimization with Indefinite Kernels. Parallel Problem Solving from Nature-PPSN XIV. Accepted, in press. Springer.

See Also

correctionDefinite, correctionDistanceMatrix, correctionKernelMatrix, correctionCNSD, repairConditionsCorrelationMatrix

Examples

x <- list(c(2,1,4,3),c(2,4,3,1),c(4,2,1,3),c(4,3,2,1),c(1,4,3,2))
D <- distanceMatrix(x,distancePermutationInsert)
D <- correctionCNSD(D)
D
D <- repairConditionsDistanceMatrix(D)
D