昨天我下载了,怎么发现数据缺失非常厉害,2007年和2009年的数据只有几百个样本,楼主能否重现发给我一下,我可是花了8个论坛币,我的邮箱是
rui2003fang@yahoo.com.cn.
-> year = 1999 930
-> year = 2000 295
-> year = 2001 847
-> year = 2002 286
-> year = 2003 982
-> year = 2004 281
-> year = 2005 1072
-> year = 2006 1434
-> year = 2007 276
-> year = 2008 1326
-> year = 2009 274