自顶，现在贴上数据的前2行：
（1）0,udp,private,SF,105,146,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0.00,0.00,0.00,0.00,1.00,0.00,0.00,255,254,1.00,0.01,0.00,0.00,0.00,0.00,0.00,0.00,normal.
（2）0,udp,private,SF,105,146,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0.00,0.00,0.00,0.00,1.00,0.00,0.00,255,254,1.00,0.01,0.00,0.00,0.00,0.00,0.00,0.00,normal.

如上所示，有很多列的数据大部分是0，极少数是1，所以被SPSS直接踢掉了，但是从常识判断那几列中又很重要，所以想问一下。

PS：还有个问题，例如第2到4列，是有限个字符串，应该如何处理呢？是按1/2/3...赋值吗？有没有更好的方法？

字符型主成分分析就得转化为数值型，要是这些字符型不影响你的目标因变量，可以在主成分是不提取他们，然后在综合得分时根据自己的经验给一个权重分数