Newport iServer MicroServer iTHX-M Operator's Manual page 356

original Rank position
positions (used to
assign ranks)
4 1
5 2
2 3
1 4
3 5
348
Affymetrix GeneChip ®
Table C.1
Absolute values
Original non-zero
position differences
d1 = 2
1
d2 = 1
2
d3 = -2
3
d4 = 0.5
4
d5 = 0.5
5
Next, we sort the absolute values in ascending order and assign a rank
to them. If all a 's are different from each other, we rank them with
i
integers from 1 to n, and assign the original signs to these ranks to
form the signed ranks. We denote the ranks by r
of d by s . If there are ties among a
i i
assigned to a rank equal to the average of the integer ranks.
Table C.2
Assigning rank values to the sorted absolute values
Sorted in
increasing
order
a4 = 0.5
a5 = 0.5
a2 = 1
a1 = 2
a3 = 2
Ties are assigned a rank equal to the average of the
rank positions that the tied values occupy
Genotyping Analysis Software User's Guide
convert to
absolute values
a1 = 2
a2 = 1
a3 = 2
a4 = 0.5
a5 = 0.5
, all differences in a tie group are
i
Assign Ranks
Rank position r4 = 1.5
(1 +2)/2
r5 = 1.5
3 r2 = 3
Rank position r1 = 4.5
(4 + 5)/2
r3 = 4.5
and the signed rank
i
Signed Ranks
s4 = 1.5
s5 = 1.5
s2 = 3
s1 = 4.5
s3 = - 4.5