[Pkg-javascript-commits] [science.js] 30/87: Add KDE example.

Thu Dec 8 06:11:54 UTC 2016

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bhuvan-guest pushed a commit to branch master
in repository science.js.

commit 31e6074f07a184afe969e1ecbec17da2072c2388
Author: Jason Davies <jason at jasondavies.com>
Date:   Fri Aug 26 14:33:23 2011 +0100

    Add KDE example.
---
 examples/kde/faithful.json |  8 ++++++++
 examples/kde/kde.css       |  9 +++++++++
 examples/kde/kde.html      | 14 ++++++++++++++
 examples/kde/kde.js        | 40 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+)

diff --git a/examples/kde/faithful.json b/examples/kde/faithful.json
new file mode 100644
index 0000000..f801c91
--- /dev/null
+++ b/examples/kde/faithful.json
@@ -0,0 +1,8 @@
+[
+  79, 54, 74, 62, 85, 55, 88, 85, 51, 85, 54, 84, 78, 47, 83, 52, 62, 84, 52, 79, 51, 47, 78, 69, 74, 83, 55, 76, 78, 79, 73, 77, 66, 80, 74, 52, 48, 80, 59, 90, 80, 58, 84, 58, 73, 83, 64, 53,
+  82, 59, 75, 90, 54, 80, 54, 83, 71, 64, 77, 81, 59, 84, 48, 82, 60, 92, 78, 78, 65, 73, 82, 56, 79, 71, 62, 76, 60, 78, 76, 83, 75, 82, 70, 65, 73, 88, 76, 80, 48, 86, 60, 90, 50, 78, 63, 72,
+  84, 75, 51, 82, 62, 88, 49, 83, 81, 47, 84, 52, 86, 81, 75, 59, 89, 79, 59, 81, 50, 85, 59, 87, 53, 69, 77, 56, 88, 81, 45, 82, 55, 90, 45, 83, 56, 89, 46, 82, 51, 86, 53, 79, 81, 60, 82, 77,
+  76, 59, 80, 49, 96, 53, 77, 77, 65, 81, 71, 70, 81, 93, 53, 89, 45, 86, 58, 78, 66, 76, 63, 88, 52, 93, 49, 57, 77, 68, 81, 81, 73, 50, 85, 74, 55, 77, 83, 83, 51, 78, 84, 46, 83, 55, 81, 57,
+  76, 84, 77, 81, 87, 77, 51, 78, 60, 82, 91, 53, 78, 46, 77, 84, 49, 83, 71, 80, 49, 75, 64, 76, 53, 94, 55, 76, 50, 82, 54, 75, 78, 79, 78, 78, 70, 79, 70, 54, 86, 50, 90, 54, 54, 77, 79, 64,
+  75, 47, 86, 63, 85, 82, 57, 82, 67, 74, 54, 83, 73, 73, 88, 80, 71, 83, 56, 79, 78, 84, 58, 83, 43, 60, 75, 81, 46, 90, 46, 74
+]
diff --git a/examples/kde/kde.css b/examples/kde/kde.css
new file mode 100644
index 0000000..101c69d
--- /dev/null
+++ b/examples/kde/kde.css
@@ -0,0 +1,9 @@
+body {
+  font: 10px sans-serif;
+}
+
+path {
+  stroke: #000;
+  stroke-width: 1.5px;
+  fill: none;
+}
diff --git a/examples/kde/kde.html b/examples/kde/kde.html
new file mode 100644
index 0000000..612567a
--- /dev/null
+++ b/examples/kde/kde.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Kernel Density Estimation</title>
+    <link rel="stylesheet" type="text/css" href="kde.css"/>
+    <script type="text/javascript" src="../../lib/d3/d3.js"></script>
+    <script type="text/javascript" src="../../lib/d3/d3.layout.js"></script>
+    <script type="text/javascript" src="../../science.js"></script>
+    <script type="text/javascript" src="../../science.stats.js"></script>
+  </head>
+  <body>
+    <script type="text/javascript" src="kde.js"></script>
+  </body>
+</html>
diff --git a/examples/kde/kde.js b/examples/kde/kde.js
new file mode 100644
index 0000000..bbe83c5
--- /dev/null
+++ b/examples/kde/kde.js
@@ -0,0 +1,40 @@
+// Based on http://bl.ocks.org/900762 by John Firebaugh
+d3.json("faithful.json", function(faithful) {
+  data = faithful;
+  var w = 800,
+      h = 400,
+      x = d3.scale.linear().domain([30, 110]).range([0, w]);
+      bins = d3.layout.histogram().frequency(true).bins(x.ticks(60))(data),
+      max = d3.max(bins, function(d) { return d.y; }),
+      y = d3.scale.linear().domain([0, .1]).range([0, h]),
+      kde = science.stats.kde().sample(data);
+
+  var vis = d3.select("body")
+    .append("svg:svg")
+      .attr("width", w)
+      .attr("height", h);
+
+  var bars = vis.selectAll("g.bar")
+      .data(bins)
+    .enter().append("svg:g")
+      .attr("class", "bar")
+      .attr("transform", function(d, i) {
+        return "translate(" + x(d.x) + "," + (h - y(d.y)) + ")";
+      });
+
+  bars.append("svg:rect")
+      .attr("fill", "steelblue")
+      .attr("width", function(d) { return x(d.dx + 30) - 1; })
+      .attr("height", function(d) { return y(d.y); });
+
+  var line = d3.svg.line()
+      .x(function(d) { return x(d[0]); })
+      .y(function(d) { return h - y(d[1]); });
+
+  vis.selectAll("path")
+      .data(d3.values(science.stats.bandwidth))
+    .enter().append("svg:path")
+      .attr("d", function(h) {
+        return line(kde.bandwidth(h)(d3.range(30, 110, .1)));
+      });
+});

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