atlas/web/_js/stats.js

var areasSum = 0;
var areas = [];

for(var q = 0; q < atlas.length; q++){

	var path = atlas[q].path;

	var area = 0,
		i,
		j,
		point1,
		point2;

	for (i = 0, j = path.length - 1; i < path.length; j=i,i++) {
		point1 = path[i];
		point2 = path[j];
		area += point1[0] * point2[1];
		area -= point1[1] * point2[0];
	}

	area = Math.abs(area/2);

	areasSum += area;
	areas.push(area);

	atlas[q].area = area;
	
}

areas.sort(function(a, b){
	if (a < b) {
		return -1;
	}
	if (a > b) {
		return 1;
	}
		// a must be equal to b
	return 0;
});

atlas.sort(function(a, b){
	if (a.area < b.area) {
		return -1;
	}
	if (a.area > b.area) {
		return 1;
	}
		// a must be equal to b
	return 0;
});

var el = document.createElement("canvas");
el.style.position = "absolute";
el.style.top = "0px";
el.style.zIndex = "10000";
var ctx = el.getContext("2d");
el.width = 1600;
el.height = 500;
var steps = 150;
var max = 1500;

var largerThanMax = 0;

for(var i in areas){
	if(areas[i] > max){
		largerThanMax++;
	}
}

console.log("There are "+largerThanMax+" entries larger than "+max+", accounting for "+(largerThanMax/areas.length*100)+"% of all entries.");
console.log("The largest entry has an area of "+areas[areas.length-1]+" pixels.");

var counts = [0];
var brackets = [max/steps];

var bracket = 0;

var mostCounts = 0;

for(var i in areas){
	if(areas[i] > (bracket+1)*(max/steps)){
		mostCounts = Math.max(mostCounts, counts[bracket]);
		bracket++;
		if(bracket >= steps){
			break;
		}
		counts[bracket] = 0;
		brackets[bracket] = (bracket+1)*(max/steps);
	}
	counts[bracket]++;
}
//console.log(counts);
//console.log(brackets);
//console.log(mostCounts);

ctx.fillStyle = "#FFFFFF";
ctx.fillRect(0, 0, el.width, el.height);
ctx.strokeStyle = "#F5F5F5";

ctx.fillStyle = "#333333";
ctx.font = "15px sans";
ctx.textAlign = "right";
ctx.textBaseline = "middle";

var linesDistance = 1;

for(var i = 0; i <= Math.ceil((mostCounts/linesDistance)/5)*5; i++){
	ctx.beginPath();
	ctx.moveTo(
		 50
		,~~(el.height - 50 - i*(linesDistance/mostCounts)*(el.height-100))+0.5
	);
	ctx.lineTo(
		 el.width-25
		,~~(el.height - 50 - i*(linesDistance/mostCounts)*(el.height-100))+0.5
	);
	ctx.stroke();
}

ctx.strokeStyle = "#333333";
linesDistance = 5;

for(var i = 0; i <= Math.ceil(mostCounts/linesDistance); i++){
	ctx.beginPath();
	ctx.moveTo(
		 50
		,~~(el.height - 50 - i*(linesDistance/mostCounts)*(el.height-100))+0.5
	);
	ctx.lineTo(
		 el.width-25
		,~~(el.height - 50 - i*(linesDistance/mostCounts)*(el.height-100))+0.5
	);
	ctx.stroke();
	
	ctx.fillText(
		i*linesDistance
		,40
		,~~(el.height - 50 - i*(linesDistance/mostCounts)*(el.height-100))+0.5
	);
}

var skip = 2;

ctx.textAlign = "center";
ctx.textBaseline = "hanging";
ctx.font = "10px sans";

var a = 0;
for(var i=0; i <= counts.length; i++){
	if(i%skip == 0){
		var y = 0;
		if(a % 2 == 0){
			y = ~~(el.height - 30)+0.5;
		} else {
			y = ~~(el.height - 45)+0.5;
		}
		a++;
		ctx.beginPath();
		ctx.moveTo(
			 ~~(((i)/steps)*(el.width-125)+75)+0.5
			,~~(el.height - 50)+0.5
		);
		ctx.lineTo(
			 ~~(((i)/steps)*(el.width-125)+75)+0.5
			,y
		);
		ctx.stroke();

		ctx.fillText(
			 (i)*(max/steps)
			,~~(((i)/steps)*(el.width-125)+75)-0.5
			,y+5
		);
	}
}

ctx.fillStyle = "#FF0000";
ctx.strokeStyle = "#CC0000";

for(var i = 0; i < counts.length; i++){
	if(i%2 == 0){
		ctx.fillStyle = "#FF0000";
	} else {
		ctx.fillStyle = "#DD0000";
	}
	
	ctx.fillRect(
		 ~~((i/steps)*(el.width-125)+75)
		,el.height - 50
		,Math.ceil(1/steps*(el.width-125))
		,~~(-(counts[i]/mostCounts)*(el.height-100))
	);

	/*ctx.beginPath();
	ctx.moveTo(
		 ~~((i/steps)*(el.width-125)+75)+0.5
		,~~(el.height - 50)
	);
	ctx.lineTo(
		 ~~((i/steps)*(el.width-125)+75)+0.5
		,~~(el.height-(counts[i]/mostCounts)*(el.height-100))-50+0.5
	);
	ctx.lineTo(
		 ~~(((i+1)/steps)*(el.width-125)+75)+0.5
		,~~(el.height-(counts[i]/mostCounts)*(el.height-100))-50+0.5
	);
	ctx.lineTo(
		 ~~(((i+1)/steps)*(el.width-125)+75)+0.5
		,~~(el.height - 50)
	);
	ctx.stroke();*/
}

document.getElementById("wrapper").appendChild(el);

//console.log(areas);

console.log("Median area: "+areas[~~(areas.length/2)]);

console.log("Average area: "+(areasSum/atlas.length));

var topCount = 50;
console.log("The "+topCount+" largest entries:");

var outstring = "";

for(var i = 0; i < topCount; i++){
	outstring += ((i+1)+"|["+atlas[atlas.length-i-1].name +"](http://place-atlas.stefanocoding.me/?id="+atlas[atlas.length-i-1].id+")|"+ ~~atlas[atlas.length-i-1].area+"|"+Math.round(atlas[atlas.length-i-1].area/100)/100+"%\n");
}

console.log(outstring);

atlas.sort(function(a, b){
	if (a.center[0] < b.center[0]) {
		return -1;
	}
	if (a.center[0] > b.center[0]) {
		return 1;
	}
		// a must be equal to b
	return 0;
});

console.log("Median x: "+atlas[~~(atlas.length/2)].center[0]);

atlas.sort(function(a, b){
	if (a.center[1] < b.center[1]) {
		return -1;
	}
	if (a.center[1] > b.center[1]) {
		return 1;
	}
		// a must be equal to b
	return 0;
});

console.log("Median y: "+atlas[~~(atlas.length/2)].center[1]);