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. Author manuscript; available in PMC: 2010 Aug 31.
Published in final edited form as: J Am Stat Assoc. 2010 Jun 1;105(490):713–726. doi: 10.1198/jasa.2010.tm09415

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)
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