METHODS 1HNMR spectra of ether-extracts of samples were examined, and 1HNMR spectra were translated to a digital matrix, then PCA and PLS-DA were used to analyze the digital matrix.

• 方法以1HNMR法测定川芎乙醚提取物，将图谱转化为数据矩阵，分别采用PCA、PLS-DA两种模式识别方法分析数据。