AXIS_SIZE = 20;
EXTRA_PIXELS = 25;

function drawplot() {

plot_w= 300 ;
plot_h= 300 ;
var paper = Raphael(10, 10, plot_w + EXTRA_PIXELS, plot_h + EXTRA_PIXELS);


axis = drawAxis(paper,  300 ,  300 , [], [], " ", [0,4], [0,15],  2 , " black ", [1,2,3], [3,6,9,12,15], [1,2,3], [3,6,9,12,15] );

brplt_values = [2.5,7,11];


brplt = bargraph(paper, 300, 300, brplt_values, [0,4], [0,15], " black ");


}