Using render in datatable makes it readonly but want edit

Hi, I am using datatable and Editor plugin along with. I have written render for a column and it is showing the value with % but readonly mode. Is render meant to make the field readonly. The need to have a editable input field formatted to show %. Can you please give other options to make this possible. Thanks.

{
"title": "Marks by percent",
"data": null,
"orderable": false,
"render": function(){
return marks + '%';
}
},