Hey guys still trying to get used to D3 and might sound basic. I used the wiki and some other posts but I think some of my stuff might be outdated. Im trying to take the year and MPG from my csv file and make a scatter plot with it with x as year. I also dont want to shortcut and modify the csv file bec i want to learn how to do it no matter how many attributes there are. I think part of the problem im having is this part of my code:
d3.csv("data.csv", function(data) {
dataset = data.map(function(d) { return [ +d["Year"], +d["MPG"] ]; });
});
x.domain(d3.extent(data, function(d) { return d.Year; })).nice();
y.domain(d3.extent(data, function(d) { return d.MPG; })).nice();
But I will let you guys judge that. This is what I have so far:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.dot {
stroke: #000;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scale.linear()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.category10();
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.csv("data.csv", function(data) {
dataset = data.map(function(d) { return [ +d["Year"], +d["MPG"] ]; });
});
x.domain(d3.extent(data, function(d) { return d.Year; })).nice();
y.domain(d3.extent(data, function(d) { return d.MPG; })).nice();
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.append("text")
.attr("class", "label")
.attr("x", width)
.attr("y", -6)
.style("text-anchor", "end")
.text("Year");
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("class", "label")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("MPG")
svg.selectAll(".dot")
.data(data)
.enter().append("circle")
.attr("class", "dot")
.attr("r", 3.5)
.attr("cx", function(d) { return x(d.Year); })
.attr("cy", function(d) { return y(d.MPG); })
.style("fill", function(d) { return color(d.species); });
var legend = svg.selectAll(".legend")
.data(color.domain())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", width - 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });
});
</script>
My csv file loooks like this:
Car, Manufacturer,MPG,Cylinders,Displacement,Horsepower,Weight,Acceleration,ModelYear,Origin chevelle malibu,chevrolet,18,8,307,130,3504,12,70,American skylark 320,buick,15,8,350,165,3693,11.5,70,American satellite,plymouth,18,8,318,150,3436,11,70,American rebel sst,amc,16,8,304,150,3433,12,70,American torino,ford,17,8,302,140,3449,10.5,70,American
d3.csv
is asynchronous. You need to put all the code that usesdataset
inside the callback. – Lars Kotthoff