Project:Sandbox

{	"version": 2, "width": 400, "height": 200, "data": [ {			"name": "table", "values": [ {					"x": 0, "y": 1 },				{					"x": 1, "y": 3 },				{					"x": 2, "y": 2 },				{					"x": 3, "y": 4 }			]		}	],	"scales": [ {			"name": "x", "type": "linear", "range": "width", "zero": false, "domain": { "data": "table", "field": "x" }		},		{			"name": "y", "type": "linear", "range": "height", "nice": true, "domain": { "data": "table", "field": "y" }		}	],	"axes": [ {			"type": "x", "scale": "x" },		{			"type": "y", "scale": "y" }	],	"marks": [ {			"type": "area", "from": { "data": "table" },			"properties": { "enter": { "x": { "scale": "x", "field": "x" },					"y": { "scale": "y", "field": "y" },					"y2": { "scale": "y", "value": 0 },					"fill": { "value": "steelblue" },					"interpolate": { "value": "monotone" }				}			}		}	] } $$f''(x) dx$$