I am trying to import some data from a .csv using d3.js. I am having trouble doing this, and was wondering if anyone could lend a hand. My .csv file is formatted like so:

max_i,min_i,max_f,min_f

-122.1430195,-122.1430195,-122.415278,37.778643

-122.1430195,-122.1430195,-122.40815,37.785034

-122.4194155,-122.4194155,-122.4330827,37.7851673

-122.4194155,-122.4194155,-122.4330827,37.7851673

-118.4911912,-118.4911912,-118.3672828,33.9164666

-121.8374777,-121.8374777,-121.8498415,39.7241178

-115.172816,-115.172816,-115.078011,36.1586877

-82.5618186,-82.5618186,-79.2274115,37.9308282

-79.9958864,-79.9958864,-80.260396,40.1787544

-74.1243063,-74.1243063,-74.040948,40.729688

-106.609991,-106.609991,-106.015897,35.640949

I am trying to load the data using the following code:

var dataset = []

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

   dataset = data.map(function(d) { return [ +d[max_i], +d[min_i] ]; });

});

console.log(dataset)

However, I just get an empty [] in the console. Can anyone point out my mistake?