Skip to content

Instantly share code, notes, and snippets.

@jalapic
Created September 20, 2015 03:04
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save jalapic/cf35b0212d18993ca07c to your computer and use it in GitHub Desktop.
Save jalapic/cf35b0212d18993ca07c to your computer and use it in GitHub Desktop.
Scatterplot, transition + diagonal line
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<title>scatterplot|transition</title>
<style type="text/css">
h1{
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
font-size: 26px;
font-style: bold;
}
body {
background-color: #F9FFFF;
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
font-size: 16px;
font-style: bold;
}
svg {
background-color: #F9FFFF;
}
.mycirc {
stroke-width: 2;
stroke: #411dae;
fill: #3adddb;
}
.mycirc:hover {
stroke: #170a3d;
fill: #181a8f;
}
.axis path,
.axis line {
fill: none;
stroke: black;
shape-rendering: crispEdges;
}
.axis text {
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
font-style: bold;
font-size: 11px;
}
</style>
<h1>Stop and Frisk Totals by Race for NYC in 2014 </h1>
</head>
<body>
<p>Original data available at <a href="http://www.nyc.gov/html/nypd/html/analysis_and_planning/stop_question_and_frisk_report.shtml">NYC.gov</a>.</p>
<script type="text/javascript">
var w = 700;
var h = 500;
var padding = [ 20, 20, 50, 80 ]; //Top, right, bottom, left
// scale x data linearly
var xScale = d3.scale.linear()
.range([ padding[3], w - padding[1]])
;
// scale y data ordinally
var yScale = d3.scale.linear()
.range([ padding[0], h - padding[2] ]);
// add x-axis
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
// .tickFormat(d3.format("d")); //remove comma
;
// add y-axis
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left");
var svg = d3.select("body")
.append("svg")
.attr("width", w)
.attr("height", h);
d3.csv("stopfrisksum.txt", function(data) {
// inform domain to widthScale - x data
xScale.domain([ 0, d3.max(data, function(d) {
return +d.Brooklyn;
}) ]).nice();
// inform domain to heightScale - y axis
yScale.domain([
d3.max(data, function(d) {
return +d.Queens;
})
,0
])
.nice();
var circles = svg.selectAll("circle")
.data(data)
.enter()
.append("circle");
// initial characterization of circles
circles.attr("class", "mycirc")
.attr("cx", function(d){return xScale(d.Brooklyn);})
.attr("cy", function(d) {return yScale(d.Queens);})
.attr("r", .1)
.append("title")
.text(function(d) {
return d.race + " individuals were stopped and frisked " + d.total + " times in NYC in 2014";
});
// transition entrance of cicles
circles.sort(function(a, b) {
return d3.ascending(+a.total, +b.total);
})
.transition()
.delay(function(d, i) {
return i * 250;
})
.duration(2000)
.attr("r", 5);
// add x-axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + (h - padding[2]) + ")")
.call(xAxis);
// add y-axis
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + padding[3] + ",0)")
.call(yAxis);
// add diagonal line
svg.append("line")
.attr("x1", xScale(0))
.attr("y1", yScale(0))
.attr("x2", xScale(6000))
.attr("y2", yScale(6000))
.attr("stroke-width", 2)
.attr("stroke", "red")
.attr("stroke-dasharray", "5,5") //style of svg-line
;
// text label for the x axis
svg.append("text")
.attr("x", (w + padding[3]) /2 )
.attr("y", h - (padding[3])/7)
.attr("style","font-size:16px; font-weight: bold;") // to bold title
.style("text-anchor", "middle")
.text("Brooklyn Total");
// Add the text label for the Y axis
svg.append("text")
.attr("transform", "rotate(-90)")
.attr("y", padding[3]/3)
.attr("x", (-h+padding[0])/2)
.attr("style","font-size:16px; font-weight: bold;") // to bold title
.style("text-anchor", "middle")
.text("Queens Total");
});
</script>
</body>
</html>
"race","Bronx","Brooklyn","Manhattan","Queens","Staten_Island","total"
"AMERICAN INDIAN/ALASKAN NATIVE",16,23,14,115,17,185
"ASIAN/PACIFIC ISLANDER",39,332,138,1594,70,2173
"BLACK",3182,8696,3434,5688,2468,23468
"BLACK-HISPANIC",839,547,661,478,158,2683
"OTHER",143,160,239,107,57,706
"WHITE",199,1243,711,1715,1259,5127
"WHITE-HISPANIC",2115,1978,1563,2919,735,9310
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment