Table 2.

Weight combinations, permutations and possible weighted sum values in the restricted grid search parameter selection scheme

Weight combinationsa	Number of corresponding weight permutations
1 × 1	15
	1365
	2730
	15 015
	2730
	1365
	60 060
	45 045
	1365
	2730
	60 060
	90 090
	270 270
	45 045
	455
	90 090
	135 135
	60 060
	675 675
	360 360
	15 015
	3003
	225 225
	420 420
	75 075
	1365
	1
Possible weighted
sum values

^aWeight combinations are denoted as the sum of each weight value multiplied by the number of weights taking the weight value, with weight value 0 omitted. For instance, ‘1 × 1’ represents cases where one weight takes the value 1, and the other 14 weights taking the value 0; and ‘’ represent cases where 2 of the 15 weights take the value , 1 weight takes the value , and the remaining 12 weights take the value 0. Each weight combination corresponds to one or more weight permutations. For instance, for weight combination ‘1 × 1’, the weight value 1 can be taken by each of the 15 weights, thus it corresponds to weight permutations. Similarly, for weight combination ‘’, there are corresponding weight permutations.