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Forked from ptvans/_.md
Created September 30, 2012 02:51
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just another inlet to tributary
{"editor_editor":{"coffee":false,"vim":false,"emacs":false,"width":601,"height":546,"hide":false},"endpoint":"tributary","public":true}
//these are your variables - click and drag to change
var time = 310;
var base = 201969;
var conv = 0.016;
var invite = 7.5;
var cycle = 67;
var k = conv * invite;
var di = 0.15;
var data = d3.range(0, time);
//we want to map our x values to pixel values
var xscale = d3.scale.linear()
.domain([d3.min(data), d3.max(data)]) //scale range of chart
.range([0, 555]); //width of chart
//we want to map our y values to pixel values
var yscale = d3.scale.linear()
.domain([base,247887]) //scale range of chart
.range([379, 0]) //height of chart
var line = d3.svg.line()
.x(function(d) {
//for each x value we map it to the pixel value
return xscale(d);
})
.y(function(d,i) {
//this is the math for NEW USERS = base * (k^(t/cycle +1) -1) / (k-1)
var pow = Math.pow(k, d/cycle + 1);//this returns k to the power of d/cycle +1
console.log(base * (pow - 1) / (k - 1))
return yscale(base * (pow - 1) / (k - 1));
});
var svg = d3.select("svg");
var path = svg.append("path")
.data([data])
.attr("d", line) //this calls the line function with this element's data
.style("fill", "none")
.style("stroke", "#4B8FB6")
.style("stroke-width",2)
.attr("transform", "translate(" + [84, 31] + ")")
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