[R] Column sums from a data frame (without the column headers)

Jason Horn jhorn at bu.edu
Fri Feb 29 20:21:19 CET 2008


Does anyone know how to get a vector of column sum from a data frame?   
You can use colSums(), but this gives you a object of type "numeric"  
with the column labels in the first row, and the sums in the second  
row.  I just want a vector of the sums, and I can't figure out a way  
to index the "numeric" object.

Thanks!



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