各位前辈好~最近在写朋友关系的网络关系代码，用到stata的mata去写，但是有些问题。先附上我的代码：
系统提示了以下错误：
① 'g' found where '(' expected

②'double' found where almost anything else expected

③id1 not found （这个我很好奇为什么id1找不到呢）

④'using' found where almost anything else expected

⑤'local' found where almost anything else expected

⑥expression invalid

就是这六个报错，还请各位赐教。