通过相关分析进行质量指标提取，采用逐步聚类分析方法，对柚木1年生苗木分级标准进行了初步探讨。

Preliminary discussion on the standards for classification of 1-year nursery stuck of Tectona grandis L. is conducted with the method of gradual cluster analysis and relevant quality index collection.

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采用最小距离方法逐步聚类分析，对理水调洪型植被群落分为高功能理水调洪型、一般功能理水调洪型、低功能理水调洪型、功能退化型4个等级。

The clustering analysis of least distance method was applied, the results showed that types of the phytocoenosium are 4: high function, commonly function, low function and degenerative function type.

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步骤2 .完成后，对这28个芦荟样品根据其HPLC数据进行系统聚类分析和逐步判别分析。

After step 2. had been carried out, based on the HPLC data obtained, a hierarchical cluster analysis and a stepwise discrimination analysis were performed on the 28 aloe samples.

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