Plot bar charts. See example below:
var graph = new Graph({
appendTo : "container",
canvasWidth : 800,
canvasHeight : 800/Math.sqrt(2),
title : "Number of skipped lectures by months",
xAxisTitle : "Months",
yAxisTitle : "Skipped Lectures",
colorList : ["#00F"],
barWidth: 0.8,
barPosition: "center",
xAxisNumSteps:12,
yAxisNumSteps: 10,
yGridNumLines: 10,
drawYAxis : 1,
drawXAxis : 1
});
var y, labels;
y = [3,5,4,1,7,0,0,0,6,8,3,10];
labels = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
graph.bars(y, labels, [0,12]);