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A quick & dirty bash solution :
c=1 file=file.txt num_lines=$(wc -l < "$file") for ((i=0; i<num_lines; i++)) { cut -d, -f$c $file"$file" | paste -sd ',' ((c++)) }
c=1 file=file.txt num_lines=$(wc -l < "$file") for ((i=0; i<num_lines; i++)) { cut -d, -f$c $file | paste -sd ',' ((c++)) }
c=1 file=file.txt num_lines=$(wc -l < "$file") for ((i=0; i<num_lines; i++)) { cut -d, -f$c "$file" | paste -sd ',' ((c++)) }
c=1 file=file.txt num_lines=$(wc -l < "$file") for ((i=0; i<num_lines; i++)) { cut -d, -f$c /tmp/l$file | paste -sd ',' ((c++)) }
c=1 file=file.txt num_lines=$(wc -l < "$file") for ((i=0; i<num_lines; i++)) { cut -d, -f$c /tmp/l | paste -sd ',' ((c++)) }
c=1 file=file.txt c=1num_lines=$(wc -l < "$file") while for read((i=0; a;i<num_lines; doi++)) { var=$(cut -d, -f$c $file/tmp/l | paste -sd ',') echo $var ((c++)) done < "$file"}
file=file.txt c=1 while read a; do var=$(cut -d, -f$c $file | paste -sd ',') echo $var ((c++)) done < "$file"
