重复次数统计 - Stata专版

重复次数统计

LNZZ冷暖

1220

收藏 2021-05-07

有没有大牛指导以下，怎么将A中每个种类重复的次数统计出来，比如以下字符串种类个数为2，其中A01N61有1个，A01N43有两个
A01N61;A01N43;01N43卡在这一步很久了，希望有人指导一下！！！！
谢谢谢谢谢谢谢谢谢！！！

input long Scode int Year strL A
9 2007 ""
9 2008 ""
9 2008 ""
9 2009 ""
9 2009 "A01N61;A01N43;A01P3;A01P21;A01N43;A01N37;A01N25;A01P3;A01P21;A01P1;A01N65;A01N43;A01N25;A01N25;A01P7;A01N25;A01N25;A01P7;A01P3;A01P1;A01P13;C05G3"
9 2010 ""
9 2010 "A01N43;A01N43;A01N25;A01P7;A01P21;A01N63;A01N43;A01N25;A01P3"
9 2011 ""
9 2011 ""
9 2011 "A01N43;A01N25"
9 2012 ""
9 2012 "A01N65;A01N43;A01N43;A01P5;A01N65;A01N43;A01N43;A01N25;A01P7"
9 2013 ""
9 2013 ""
9 2014 ""
9 2014 "A01N43;A01N25;A01P7;A01N65;A01N43;A01N25;A01P17;A01P7"
9 2015 ""
9 2015 ""
9 2015 "A01N65;A01P7;A01P17;A01N43N"
9 2016 ""
9 2016 ""
9 2016 "B01D47;B01D47;B01D50;A23K10;C05F5;F26B21;B01J23;B01D53;B01D53;B01D46;A62D3"
10 2007 ""
10 2008 ""
end