Cosine wave function example. Try zooming in and out (mouse scroll on canvas).

dg.js example code

		var canvas = dg.Canvas("testcanvas", { border: "1px solid #ccc"});
		var axes = dg.Axes([canvas.width() / 4, canvas.height() / 1.5]).hide(false);
		
		
		var f = dg.Function(function(x) { return Math.cos(x); }, dg.color.rand()).step(0.1);
		var interval = setInterval(animate, 30);
		
		var step = 0.05;
		var t = 0;
		function animate() {
			
			f.setF(function(x) { return Math.cos(x) * Math.sin(t); });
			t += step;
		}