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STATA - Coggle Diagram
STATA
data preprocessing
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text data
encode province,generate(provID)
destring kid_num, replace force ignore("or more")
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strpos(s1,s2) return the first position of s2 in s1
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substr(s,n1,n2) 截取n1和n2位置之间(以1开头，闭区间）的字符串，如果n2是.，就表示取到最后
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reshaping datasets
reshape long stub, i(i) j(j) stub是像转置的变量名的共同前缀，i就是保留不发生转置的变量；j就是我们想生成的新变量。也可以reshape wide ...
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self study
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learn more commands in class, use them with the help command
STATA
Data entry
with data editor, you can easily change the properties of your variables
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