I am trying to build a sankey using google charts. Here is the Link.

function convertFormat(data) {
  if (data.length === 0) return [];
  let new_data = [];
  let key_data = [];
  Object.keys(data[0]).map((key) => {
    if (key !== "id") key_data.push(key);
  });
  new_data.push(key_data);

  data.map((item) => {
    let new_item = [];
    Object.values(item).map((value, index) => {
      if (index !== 0) new_item.push(value);
    });
    new_data.push(new_item);
  });
  return new_data;
}

I was trying the above code to convert my data into the below format so that i can provide it into google charts (sankey chart).

const data = [
  ["Word", "Target", "Weight"],
  ["AN", "Female", 0],
  ["Aaron", "Male", 0],
  ["Abbey","Female", 0],
];

But i am getting this error when i tried it. Error: <text> attribute y: Expected length, "NaN".