principal compoenent analysis

• 大黄

principal compoenent analysis的用法和样例：

例句

1. Concentration of alcohol, reflowing time and amont of alcohol was tested in cluster analysis for alcohol extracting procedure.
   本文选用正交设计试验，考察了各因素对大黄醇回流所得提取物中总蒽醌含量的影响。