When it comes to investing, many economists believe that a blindfolded monkey throwing darts at a newspaper’s financial pages could select a portfolio of stocks that would do just as well as Wall Street professionals. The idea that picking good stocks is just a matter of luck comes from a fundamental theory in financial economics known as the Efficient Market Hypothesis (EMH).
Introduced by Eugene Fama in the 1960s, the essence of EMH is that at any
A d3 recreation of Etsy's shopping by color animation.
Spend a few hours (minimum) going through these materials. It's okay if you don't understand half of it on your first time through (75% is way too much though). I found it super helpful to write out the code snippets and test them out while following along. There are now quite a few D3 tutorials out there, but I found these particularly helpful:
| <!doctype html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script> | |
| <link type="text/css" rel="stylesheet" href="style.css"/> | |
| <style type="text/css"></style> | |
| </head> | |
| <body> | |
| <p id="chart"> | |
| <p id="menu"><b>Top States by Age Bracket, 2008</b><br>Age: <select></select> |
| cat 1/*.txt 2/*.txt 3/*.txt 4/*.txt 5/*.txt > combined.txt | |
| awk '{arr[$1]+=1} END {for (i in arr) {print i,arr[i]}}' combined.txt > counts.txt | |
| sort -nrk 2 counts.txt |
| hello, world |
| var width = 660, | |
| height = 600; | |
| var color = d3.scale.linear() | |
| .domain([0, width/4, width/4 * 2, width/4 * 3, width]) | |
| .range(["#fb000f", "#6e00fb", "#00fbec", "#8dfb00", "#fb3c00"]) | |
| .interpolate(d3.interpolateHsl); | |
| var svg = d3.select("#colorz").append("svg") | |
| .attr("width", width) |
| (function(){ | |
| var width = 660, | |
| height = 460; | |
| var edById = {}, | |
| nameById = {}; | |
| var formatNum = d3.format(",.0f"), | |
| formatPercent = d3.format(",.0%"); |
| (function(){ | |
| // select grouped radio button (since i couldn't seem to do it in markdown) | |
| d3.select('input[value="grouped"]').property('checked', true); | |
| var data = [ | |
| [ | |
| {x: 'A', y: 1102, z: 'Brazil'}, {x: 'B', y: 1507, z: 'Spain'}, {x: 'C', y: 1200, z: 'Columbia'}, {x: 'D', y: 1132, z: 'Uruguay'}, | |
| {x: 'E', y: 1113, z: 'Switzerland'}, {x: 'F', y: 1251, z: 'Argentina'}, {x: 'G', y: 1318, z: 'Germany'}, {x: 'H', y: 1098, z: 'Belgium'} | |
| ], |
| <!DOCTYPE html> | |
| <!-- saved from url=(0014)about:internet --> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> | |
| <meta http-equiv="x-ua-compatible" content="IE=9" > | |
| <title>Title</title> |