Table 4.
Results for Simulation 2. The quantities reported are the mean and standard error (given in parentheses) of the CER, and of the number of non-zero coefficients, over 25 simulated data sets.
Simulation | Method | CER | Num. Non-zero Coef. |
---|---|---|---|
Small Simulation: p = 25, q = 5, 10 obs. per class | Sparse K-means | 0.112(0.019) | 8.2(0.733) |
K-means | 0.263(0.011) | 25(0) | |
Pan and Shen | 0.126(0.017) | 6.72(0.334) | |
COSA w/Hier. Clust. | 0.381(0.016) | 25(0) | |
COSA w/K-medoids | 0.369(0.012) | 25(0) | |
Raftery and Dean | 0.514(0.031) | 22(0.86) | |
PCA w/K-means | 0.16(0.012) | 25(0) | |
Large Simulation: p = 500, q = 50, 20 obs. per class | Sparse K-means | 0.106(0.019) | 141.92(9.561) |
K-means | 0.214(0.011) | 500(0) | |
Pan and Shen | 0.134(0.013) | 76(3.821) | |
COSA w/Hier. Clust. | 0.458(0.011) | 500(0) | |
COSA w/K-medoids | 0.427(0.004) | 500(0) | |
PCA w/K-means | 0.058(0.006) | 500(0) |