求问,如何把每个观测值的surgerycode1-surgerycode这七个字符变量按数字排序后(空值放最后),形成一个新的字符变量(排除空值)? 比如这里第28个观测值"79.6401" "39.3113" "04.7606" "79.3401" "93.5402" "" "" ,排序后变为 "04.7606" "39.3113" "79.3401" "79.6401" "93.5402" "" "",形成新的字符变量 "04.7606,39.3113,79.3401,79.6401,93.5402"
* Example generated by -dataex-. To install: ssc install dataex
clear
input str42 surgerycode1 str11(surgerycode2 surgerycode3 surgerycode4) str9(surgerycode5 surgerycode6 surgerycode7)
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"00.0301" "" "" "" "" "" ""
"85.5401" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"83.6405" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"74.1 01" "" "" "" "" "" ""
"74.1 01" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"74.1 01" "" "" "" "" "" ""
"74.1 01" "" "" "" "" "" ""
"00.0301" "" "" "" "" "" ""
"74.1 01" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"00.0301" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"79.6401" "86.6201" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"" "" "" "" "" "" ""
"00.0301" "" "" "" "" "" ""
"00.0301" "" "" "" "" "" ""
"79.6401" "39.3113" "04.7606" "79.3401" "93.5402" "" ""
"" "" "" "" "" "" ""
end


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