What[1]=j48
What[2]=nBayes
What[3]=jRip
What[4]=which2
for i in 1 2 3 4; do
    grep "${What[$i]}," accuracy.csv | cut -d, -f $i | 
               sort -n  | 
               gawk '{M*100 + (++N) "\t" $0}' M=$i |tee  /tmp/${What[$i]}.dat
done