jkutianski

Para la Argentina la proyección oficial es la Gauss-Kruger, y esta difiere bastante de la proyección Mercator que es normalmente utilizada en mapas digitales. Si queremos desplegar el territorio argentino de manera de lograr una representación armoniosa que conserve las formas y áreas, lo recomendable es usa Gauss-Kruger.

En D3.js no esta soportada esta proyeccion pero se puede optar por la proyección Mercator transversa d3.geo.transverseMercator() que es la base para la definición de la referencia cartográfica Gauss-Kruger. Esta proyección está definida dentro del plugin d3.geo.projection.js por lo que deberá ser cargado junto con d3.js.

Para poder calcular los parámetros necesarios para aplicar esta proyección es necesario calcular el centro geográfico de la Argentina continental, que está comprendida entre lo

pjsvis

// Requires jQuery from http://jquery.com/
// and jQuerySparklines from http://omnipotent.net/jquery.sparkline

// AngularJS directives for jquery sparkline
angular.module('sparkline', []);
 
angular.module('sparkline')
    .directive('jqSparkline', [function () {
        'use strict';
        return {

shovon

Installing LLVM and Clang v3.2 on OS X

I'm assuming you need this version for Emscripten.

Don't worry, this script will not override your current installation of LLVM and Clang.

Be sure that you have:

• read this README file
• read this README file

LinuxPanda

<?php
 
/*
* @gist Regex to get youtube video/playlist id with/without time & generate embed code
* @license UNLICENSE (http://unlicense.org)
*/
 
$youtube_url = array(
"https://youtu.be/yVpbFMhOAwE",
"https://www.youtube.com/embed/yVpbFMhOAwE",

mbostock

license: gpl-3.0
redirect: https://observablehq.com/@mbostock/solar-terminator

r3b

(function(){
  var db = document.body, //shortcut to document.body
    r = 100, //initial radius of the circle
    x = (db.clientWidth - r) / 2, //horizontal center
    y = (window.pageYOffset || (db.parentNode || db).scrollTop) + ((window.innerHeight+r)/2), //offset from page top
    o = 0.0, //angle offset
    w = 0, //width of square
    dl = 150, //number of divs
    ai=Math.PI / dl, //pie slice width
    divs=Array.prototype.map.call(new Int8Array(dl),function(){ //div array

jbt

t.prototype.REDACTED = function(a, b, j, c, g) {
  for(var r = this.REDACTED2(0), t = Math.tan(r), C = g % 86400 / 86400 * Math.PI * 2, g = [], n = 0;n <= c + 1;n = n + 1) {
    g[n] = Math.atan(Math.cos(2 * Math.PI * (j + n / c) / a + C) / t) / Math.PI * c * a / 2 - (b - a / 4) * c;
  }
  b = Math.max.apply(Math, g);
  j = Math.min.apply(Math, g);
  a = "";
  if(g[0] > 0 && g[0] < c) {
    a = "M0," + g[0];
    if(b >= c) {

wbzyl

SVG Essentials – Filters

This is a recreation (for the purpose of tinkering with an implementation in d3.js) of the example from the book SVG Essentials by J. David Eisenberg.

The <feColorMatrix> element allows to change color values in a following way.

nathanhammond

Running emscripten on OS X

There are a number of additional dependencies required for getting things installed on OS X. Starting with a blank slate OS X machine, this is the process it takes:

# Install Xcode Command Line Tools

# Install Homebrew
ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"

RedBeard0531

// derived from http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Parallel_algorithm

function map() {
    emit(1, // Or put a GROUP BY key here
         {sum: this.value, // the field you want stats for
          min: this.value,
          max: this.value,
          count:1,
          diff: 0, // M2,n:  sum((val-mean)^2)
    });