Table 1: The effectiveness of PCA process.

Training dataset (%)20%40%60%80%100%

Error numbers without PCA/time consumed (s)35/20.4525/29.1620/39.7821/60.789/80.49
Error numbers with PCA/time consumed (s)33/18.1526/24.7820/30.4618/50.0111/69.48