Calculate the PDA projection pursuit index. See Lee and Cook (2009) A Projection Pursuit Index for Large p, Small n Data
计算PDA投影寻踪指数。李和库克(2009年),大P的投影寻踪指数,小N个数据
用法----------Usage----------
pda_pp(cl, lambda = 0.2)
参数----------Arguments----------
参数:cl
class to be used. Such as "color"
可以使用的类。如“颜色”
参数:lambda
shrinkage parameter (0 = no shrinkage, 1 = full shrinkage)
收缩参数(0 =无收缩,1 =完全收缩)