Importing data from two csv files using d3js

Question

consider this fiddle link FIDDLE . In this example I would like to use a csv file to load data at line no.33-[data.csv] and data at line no.158-[data1.csv]. I want to use two separate csv files. I tried using a csv file for data at line no.33 with this code

 d3.csv("data.csv", function(csvData) {

csvData.forEach(function (d,i) {
    data[i] = {
      first: +d.first, 
      second: +d.second
    } 
});
console.log(data);

I was able to get an output but the charts had moved far away from each other with the following errors : Unexpected value NaN parsing cy attribute. How to load the two datasets in an efficient way using two separate csv files ?

Answer 1

Here is hopefully the final plunker in this ever-growing project :) (A lot of the csv work here has been guided by the great Lars...as usual, many kudos to him.)

Updated plunker with data on top chart coming from datam.csv.