判别分析在烤烟品质鉴定中的应用

判别分析是多元统计分析中判断个体所属类型的一种重要方法。以烤烟的总糖、还原糖、总氮、烟碱含量为指标,用距离判别法对不同品质的烤烟进行判别分析,建立判别函数。将原始数据用交互验证法对判别函数进行回判,准确率达91.43％;用新样品对判别函数进行检验,准确率达100.00％,检验结果令人满意。因此,所用的判别分析方法可行,建立的判别函数有效。

Application of Discriminant Analysis in Distinguishing Flue-cured tobacco Quality

Discriminant analysis is an important method in multivariate statistic analysis to distinguish what type an individual should belong to. Based on the content of total sugar, reduced sugar, total nitrogen and alkaloid, the discriminant analysis was used in the recognition of different qualitative flue-cured tobacco. At last, the discriminant function was developed. The rate of accuracy, of returned classification using methods of mutual test, reached to 91.43%. The rate of accuracy, of returned classification using new samples, reached 100.00%. The results showed the method of discriminant analysis was useful and the discriminant function was valid.