simple d3 script for displaying timebased events from csv

gistfile1.js

var csv = ""; // paste csv into this string

var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var parseFormat = d3.time.format("%H:%M:%S");
var displayFormat = d3.time.format("%H:%M");

var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis().scale(x).orient("bottom").tickFormat(displayFormat).ticks(25);
var yAxis = d3.svg.axis().scale(y).orient("left");

var line = d3.svg.line()
    .x(function(d) { return x(d.eventTime); })
    .y(function(d) { return y(d.value1); });


d3.select("style").text("\
    body {\
        font: 10px sans-serif;\
    }\
    .axis path,\
    .axis line {\
        fill: none;\
        stroke: #000;\
        shape-rendering: crispEdges;\
    }\
    .line {\
        fill: none;\
        stroke: steelblue;\
        stroke-width: 1.5px;\
    }\
");

d3.selectAll("svg").remove();
var svg = d3.select("body").attr({ font: "10px sans-serif" })
    .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 + ")");

var data = d3.csv.parseRows(csv);
data.shift();
data = data.map(function(line) {
    return { eventTime: parseFormat.parse(line[0]), value1: parseInt(line[1]) };
});

x.domain(d3.extent(data, function(d){ return d.eventTime; }));
y.domain(d3.extent(data, function(d){ return d.value1; }));

svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

svg.append("path")
    .datum(data)
    .attr("class", "line")
    .attr({ d: line });

svg.append("g")
    .attr("class", "y axis")
    .call(yAxis)
    .append("text")
    .attr("transform", "rotate(-90)")
    .attr("y", 6)
    .attr("dy", ".71em")
    .style("text-anchor", "end")
    .text("milliseconds");