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• Concatinating string variables As example, suppose we have the variables var1, var2, and var3. var1 and var2 are string variables, while The values in _n==1 (line 1 of the data) are the following: var1 var2 var3 aaa bbb 1111 gen var4 = var1 blog.naver.com · 2014.04.25

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