Created
December 18, 2012 21:31
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Another Inlet
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{"description":"Another Inlet","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"tab":"edit","display_percent":0.35552325581395344,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"hidepanel":false} |
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var w = 300, | |
h = 406, | |
p = [10, 20, 30, 30], | |
x = d3.scale.linear().domain([0, 2.112]).range([0, w]), | |
y = d3.scale.linear().domain([0, 6]).range([h, 0]); | |
var svg = d3.select("svg") | |
.attr("width", w + p[1] + p[3]) | |
.attr("height", h + p[0] + p[2]) | |
.append("g") | |
.attr("transform", "translate(" + p[3] + "," + p[0] + ")"); | |
svg.append("g") | |
.attr("transform", "translate(0," + y(0) + ")") | |
.call(d3.svg.axis().scale(x)); | |
svg.append("g") | |
.attr("transform", "translate(" + x(0) + ")") | |
.call(d3.svg.axis().scale(y).orient("left")); | |
svg.append("path") | |
.data([d3.range(0, 1.40575, 0.00851).map(f)]) | |
.attr("fill", "none") | |
.attr("stroke", "#FF4455") | |
.attr("d", d3.svg.line() | |
.interpolate("basis") | |
.x(function(d, i) { return x(i * .01); }) | |
.y(y)); | |
function f(n) { return Math.pow(4, n * n) - factorial(Math.pow(n, 4)); } | |
// From: http://stackoverflow.com/a/3959372/64009 | |
function factorial(op) { | |
// Lanczos Approximation of the Gamma Function | |
// As described in Numerical Recipes in C (2nd ed. Cambridge University Press, 1992) | |
var z = op + 1; | |
var p = [1.000000000190015, 76.18009172947146, -86.50532032941677, 24.01409824083091, -1.231739572450155, 1.208650973866179E-3, -5.395239384953E-6]; | |
var d1 = Math.sqrt(2 * Math.PI) / z; | |
var d2 = p[0]; | |
for (var i = 1; i <= 6; ++i) | |
d2 += p[i] / (z + i); | |
var d3 = Math.pow((z + 5.5), (z + 0.5)); | |
var d4 = Math.exp(-(z + 5.5)); | |
d = d1 * d2 * d3 * d4; | |
return d; | |
} |
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