// Creates canvas 800 × 500 at 10, 10
var paper = Raphael(10, 10, 800, 500);

// Creates an polygon
var raw_poly = "47.013,30.086 0.087,45.24 49.609,26.648 50.346,17.421 63.277,21.084 110.657,0.228";
var polygon = paper.polygon(50, 60, raw_poly);

// Updates the polygon
var new_poly = "47.013,30.086 0.087,45.24 49.609,26.648 50.346,17.421 63.277,21.084 110.657,0.228 69.127,21.084 97.674,17.421 59.075,26.648 29.338,45.24";
ngon.sett("points", new_poly);

// Creates an n-gon at x 50 and y 60 with radius 100 and 6 sides
var ngon = paper.ngon(50, 60, 100, 6);

// Updates the n-gon to have 5 edges
ngon.sett({ points: 5 });

// or
ngon.sett("points", 5);

// Creates a star at x 200 and y 60 with inner radius 50, outer radius 100 and 9 points
var star = paper.star(200, 60, 50, 100, 9);

// Updates the star to have 11 points, inner radius 40 and outer radius 120
star.sett({ points: 11, r1: 40, r2: 120 });

var type = star.setts.type;
var points = star.setts.points;
var radius = star.setts.r;
...