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Table 7 Leave-one-out cross-validation k-NN error rates for scale normalized data. Error rate and rank of each scale normalization method. "Rank" is described in detail in Table 5. For a given data set, the smallest error rate(s) and rank(s) are shown in bold. The methods and data sets are described in Tables 3 and 4, respectively.

From: Evaluation of normalization methods for cDNA microarray data by k-NN classification

Location, Scale Normalization method LIVER CANCER LYMPHOMA RENAL CELL CARCINOMA GASTRIC CARCINOMA LUNG CANCER
  Error Rate Rank Error Rate Rank Error Rate Rank Error Rate Rank Error Rate Rank
N ONRM 0.202 19.5 0.266 18.5 0.237 24 0.0347 14.5 0.359 19.5
N ONRM, W SCALE 0.185 14.5 0.303 23.5 0.211 22.5 0.0270 12 0.350 17.5
N ONRM, B SCALE 0.227 23.5 0.272 20.5 0.132 8 0.0615 22 0.425 24
N ONRM, WB SCALE 0.227 23.5 0.303 23.5 0.132 8 0.0462 21 0.392 23
SL LOESS 0.136 9 0.272 20.5 0.132 8 0.0154 3 0.350 17.5
SL LOESS, W SCALE 0.127 7 0.266 18.5 0.132 8 0.0193 6 0.342 15.5
SL LOESS, B SCALE 0.202 19.5 0.260 17 0.145 14.5 0.1000 24 0.300 11.5
SL LOESS, WB SCALE 0.191 16 0.284 22 0.119 2 0.0846 23 0.283 9.5
IG LOESS 0.133 8 0.186 15 0.132 8 0.0231 9.5 0.342 15.5
IG LOESS, W SCALE 0.141 10 0.148 11 0.132 8 0.0193 6 0.317 13.5
IG LOESS, B SCALE 0.215 22 0.216 16 0.158 18.5 0.0308 13 0.375 21
IG LOESS, WB SCALE 0.202 19.5 0.179 14 0.158 18.5 0.0231 9.5 0.383 22
IL LOESS 0.110 3.5 0.154 12 0.132 8 0.0231 9.5 0.275 7
IL LOESS, W SCALE 0.116 6 0.161 13 0.145 14.5 0.0231 9.5 0.300 11.5
IL LOESS, B SCALE 0.193 17 0.111 3 0.145 14.5 0.0385 17.5 0.359 19.5
IL LOESS, WB SCALE 0.202 19.5 0.105 1 0.145 14.5 0.0424 20 0.317 13.5
IL LOESS-SL LOESS 0.105 1.5 0.111 3 0.132 8 0.0193 6 0.267 4.5
IL LOESS-SL LOESS, W SCALE 0.105 1.5 0.136 9.5 0.132 8 0.00769 1 0.267 4.5
IL LOESS-SL LOESS, B SCALE 0.160 12 0.130 8 0.211 22.5 0.0385 17.5 0.275 7
IL LOESS-SL LOESS, WB SCALE 0.152 11 0.123 6 0.158 18.5 0.0347 14.5 0.259 3
IG LOESS-SL FILTERW7 0.113 5 0.111 3 0.119 2 0.0154 3 0.217 2
IG LOESS-SL FILTERW7, W SCALE 0.110 3.5 0.124 7 0.119 2 0.0154 3 0.209 1
IG LOESS-SL FILTERW7, B SCALE 0.180 13 0.117 5 0.171 21 0.0385 17.5 0.275 7
IG LOESS-SL FILTERW7, WB SCALE 0.185 14.5 0.136 9.5 0.158 18.5 0.0385 17.5 0.283 9.5