How to get a total sum based on a certain columns containing the same value
A dataframe has columns code1, code2, code3 etc., with codes stored in them. For each code, there is a column with number of days used days_used1, days_used2, days_used3 etc. I want to get a dataframe including a column for each code which has the days_used summed for each of the values in code.
How to get a total sum based on a certain columns containing the same value R
A dataframe has columns code1, code2, code3 etc., with codes stored in them. For each code, there is a column with number of days used days_used1, days_used2, days_used3 etc. I want to get a dataframe including a column for each code which has the days_used summed for each of the values in code.