各位前辈,我想用name进行分组,求zhi的增长率,结果如最右列所示,不知道如何操作呢?数据如下。
[CODE]
* Example generated by -dataex-. To install: ssc install dataex
clear
input str5 var20 str4 var21 str3 var22 str8 var23
"name" "year" "zhi" "jieuo"
"00001" "2008" "4" ""
"00001" "2009" "2" "=(2-4)/4"
"00001" "2010" "3" "=(3-2)/2"
"00002" "2008" "2" ""
"00002" "2009" "3" "=(3-2)/2"
"00002" "2010" "6" "=(6-3)/3"
"00003" "2008" "5" ""
"00003" "2009" "4" "=(4-5)/5"
"00003" "2010" "3" "=(3-4)/3"