Fisher岭判别方法应用于两类肝硬化疾病的诊断

试将新近提出的Ｆｉｓｈｅｒ岭判别分析法用于临床中疾病诊断研究，该法首先算出数据的组内离差阵Ｅ，然后对组内离差阵Ｅ作一类似于岭回归分析中的变换，继而用与经典的Ｆｉｓｈｅｒ判别分析法相同的步骤进行计算，将此方法用于血吸虫病肝硬化与门脉性硬化疾病诊断研究，所得结果优于经典的Ｆｉｓｈｅｒ判别分析法。

Fisher Ridge Discrimination Method Aplied to Diagnosis of Cirrhoses Based on Clinical Chemical Data

A new proposed Fisher ridge discrimination analysis method was used to the study of diagnosis of disease in clinical chemistry.The covariance matrix E within group was calculated in the first step of the new method,then E was transformed by similar rule to ridge regression, the following other steps are the same as those in the conventional Fisher discrimination method.The new method was applied to diagnosis of cirrhoses based on clinical chemical data with satisfactory results.