How to use Aggregate function in R

Question

can you help me please how to properly use aggregate function in R? I have data like this:

SPORT   FLOWS
[1,] \"Other\" \"1\"  
[2,] \"Other\" \"1\"  
[3,] \         


        

Answer 1

Assuming your dataframe is named "sport_data", I think you just want:

aggregate(sport_data, sport_data$SPORT, sum)

If you just have individual counts (that are all equal to 1), then "tabulate" may be a simpler option.

Please let us know what kind of errors you are getting. (if this doesn't work, or in the future, in your question)

Answer 2

aggregate(FLOWS ~ SPORT, dat, function(x) sum(as.numeric(x)))

where dat is the name of your matrix.

Here, the function is.numeric is necessary to transform the second column into numbers.