采用夹角余弦法计算相关系数，并使用SPSS11.0统计分析软件对指纹图谱进行系统聚类分析。
Correlative coefficient was computed using Cosine method. Hierarchical classification used SPSS11.0 statistical analysis software.
中药指纹图谱相似度的影响因素由样品所含的主要化学成分所引起 ，相关系数法比夹角余弦法对指纹图谱中小色谱峰变化的反应明显。
The important influence factors to TCMF are due to the difference of the main contents of TCM, the Cosin method is better for similarity evaluation than Correlation method.
中药指纹图谱相似度的影响因素由样品所含的主要化学成分所引起 ，相关系数法比夹角余弦法对指纹图谱中小色谱峰变化的反应明显。
The important influence factors to TCMF are due to the difference of the main contents of TCM, the Cosin method is better for similarity evaluation than Correlation method.
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