D3.js figure staying out of twitter bootstrap's div section - d3.js

Question

The codes are the following: I am trying to create two "div" .Each div has a picture. However, the pictures are collapsing together after all the texts. They do not stay in their individual div.
<div class="container">
<div class ="row">
<h1> Title </h1>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script type="text/javascript" >
var margin = {top: 20, right: 30, bottom: 30, left: 100},
width = 800 - margin.left - margin.right,
height = 600 - margin.top - margin.bottom;
var formato = d3.format("0.0");
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickFormat(formato);
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 + ")");
var dataFile_1 = "data.csv"
d3.csv(dataFile_1, function(error1, data1) {
data1.forEach(function(d) {
d.petitionRate = +d.petitionRate;
});
x.domain(data1.map(function(d) { return d.state; }));
y.domain([0, d3.max(data1, function(d) { return d.petitionRate; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
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("Participation rate");
svg.selectAll(".bar")
.data(data1)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.state); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.petitionRate); })
.attr("height", function(d) { return height - y(d.petitionRate)});
</div>
<div class ="row">
If I put a picture here as the first one. Both of them do not stay in their div.
</div>
</div>
Please help me understand what the problem is here.
Thanks.

Answer 1

This line:
var svg = d3.select("body").append("svg")
appends d3s svg to the end of the html body. If you want the svg in the
<div class ="row">
directly preceding your JavaScript code do this:
<div class ="row" id="visRow">
and then append to that div:
var svg = d3.select("#visRow").append("svg")