how to sum each column in a file using bash

Question

I have a file on the following format

id_1,1,0,2,3,lable1
id_2,3,2,2,1,lable1
id_3,5,1,7,6,lable1

and I want the summation of each column ( I

Answer 1

If the totals would need to be grouped by the label in the last column, you could try this:

awk -F, '
  {
    L[$NF]
    for(i=2; i1; j--) s=T[i,j] FS s
      print s
    }
  }
' file

If the labels in the last column are sorted then you could try without arrays and save memory:

awk -F, '
  function labelsum(){
    s=p
    for(i=NF-1; i>1; i--) s=T[i] FS s
    print s
    split(x,T)
  }
  p!=$NF{
    if(p) labelsum()
    p=$NF
  }
  {
    for(i=2; i