标题: How to get Patrick Royston’s trend (ptrend) in SAS? [打印本页] 作者: shiyiming 时间: 2007-4-26 10:57 标题: How to get Patrick Royston’s trend (ptrend) in SAS? I know Patrick Royston has code in Stata to calculate 'ptrend', but how to calcute it in SAS?
Thanks so much!