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changjx
  • Member for 7 years, 5 months
  • Last seen this week
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29
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12
reshape wide to long using data.table with multiple columns
Jan 15, 2018
2
Excel array count frequencies with multiple conditions
Oct 25, 2018
2
How to replace strings only in the string and numbers combination between double quotation Notepad++?
Dec 21, 2019
1
finding the closest rivals in the group
Feb 16, 2017
1
How to count factor and no double count in the same year
Apr 18, 2017
1
R read files name and put it into variable
Apr 25, 2017
0
How to divide each columns by last row
Apr 13, 2017
0
conditional counting but no NA
Apr 18, 2017
0
select some text from html using notepad++
May 9, 2017
0
R count occurrences of firm per 2 and 3 years
Jun 2, 2017