Geoscience Reference
In-Depth Information
Table 9.10 Unweighted
distance analysis of values
shown in Table 9.9 continued
to obtain cumulative RASC
distances of events
Events
N*
Sum
Interval
Distance
1
9-10
8
3.98
0.935
0.435
2
10-8
8
0.56
0.070
0.506
3
8-6
6
4.87
0.812
1.318
4
6-4
7
1.16
0.166
1.484
5
4-7
9
1.56
0.174
1.658
6
7-5
8
1.60
0.200
1.858
7
5-1
8
1.69
0.211
2.069
8
1-3
8
0.51
0.064
2.132
9
3-2
8
0.06
0.008
2.140
Source: Agterberg ( 1990 , Table 6.3)
The origin of the scale is set at the first event. Consequently, the
distance for event 9 is equal to zero. Event 10 has distance of
0.435; Event 2 has largest cumulative RASC distance (
¼
2.140)
s X Distance
Table 9.11 Weighted
distance analysis of values
shown in Table 9.10
Events W
Sum
Interval
1
9-10
10.3
3.27
0.317
0.100
0.317
2
10-8
7.0
1.24
0.176
0.289
0.493
3
8-6
4.7
3.62
0.770
0.203
1.262
4
6-4
9.2
2.44
0.266
0.163
1.529
5
4-7
15.0
2.34
0.157
0.153
1.686
6
7-5
14.8
2.32
0.157
0.085
1.893
7
5-1
15.2
2.96
0.195
0.082
2.038
8
1-3
12.6
1.47
0.117
0.090
2.155
9
3-2
13.3
0.08
0.006
0.124
2.149
Source: Agterberg ( 1990 , Table 6.4)
The Z -values were weighted according to sample size and stan-
dard deviations were computed as well. Note that the interval
between events 3 and 2 (on bottom row ) is negative. As a result,
event 9 has RASC distance (
¼
2.149) which is less than that of
event 8 (
¼
2.155)
s X
Table 9.12 Example of
weighted distance analysis
after reordering
Events
Interval
Distance
1
9-10
0.317
0.100
0.317
2
10-8
0.176
0.289
0.493
3
8-6
0.770
0.203
1.263
4
6-4
0.266
0.163
1.530
5
4-7
0.157
0.153
1.686
6
7-5
0.157
0.085
1.843
7
5-1
0.195
0.082
2.038
8
1-2
0.118
0.147
2.156
9
2-3
0.006
0.124
2.162
Source: Agterberg ( 1990 , Table 6.5)
The optimum sequence used as input for scaling was not the
ranking result used as input for Tables 9.9 , 9.10 , and 9.11 but
the ranking of events in the scaled optimum sequence in the last
column of Table 9.11 . Differences between Tables 9.11 and 9.12
are restricted to values in two bottom rows only
Previous Page
Next Page
Geomathematics: Theoretical Foundations, Applications and Future Developments
Search WWH ::




Custom Search
Home