var chart = new Cartesian("#chart"); chart.data.isStacked = true; chart.plot.width = 600; chart.plot.height = 315; chart.lines.interpolation = 'cardinal'; chart.areas.interpolation = 'cardinal'; chart.areas.visible = true; chart.areas.hasOpacity = true; chart.draw(data); Peek is a an object-oriented chart library for web applications, based on D3.js. Object-oriented The benefits of D3.js, but with