``` % echo "1,foo,-3.6,bar,+3.7E-9,wen,007" | csvtk csv2json -H -n1,3,5,7 [ [ "1", "foo", "-3.6", "bar", "+3.7E-9", "wen", "007" ] ] ``` I would have expected ths: ``` [ [ 1, "foo", -3.6, "bar", 3.7E-9, "wen", 7 ] ] ```