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It's possible to compute math values like standard deviation using the chart data and itegrate the value into the chart with annotateLabel or inGraphDataTmpl.

Integrated math functions

• mean
• varianz
• stddev (Standard deviation)
• cv (Coefficient of variation)

If you want to add the difference between the current value and a math function you can add a Dif after the name of the math function. For example:
inGraphDataTmpl: '<%=meanDif()%>' inGraphDataTmpl: '<%=v3-mean()%>'
If you want to have the varianz over each data point:
inGraphDataTmpl: '<%=varianz()%>'
And it's possible to round the data using inGraphDataTmpl: '<%=varianz(3)%>'
The default number of decimal places is 2
inGraphDataTmpl: '<%=varianz(2)%>' = inGraphDataTmpl: '<%=varianz()%>'

It's possible to add deviation lines into line and bar charts.(math.html)
You can specify which datasets should use a math function using drawMathDeviation. Every deviation has a

• deviationStrokeColor (default: rgba(220,220,220,1))
• deviationWidth which is the length of the horizontal lines at the top and bottopm of the vertical line (default: 0px)

var LineData = {
	labels : ["January","February","March","April","May","June","July"],
	datasets : [
		{
			fillColor : "rgba(129, 172, 123, 0.5)",
			strokeColor : "rgba(129, 172, 123, 1)",
			pointColor : "rgba(129, 172, 123, 1)",
			pointStrokeColor : "#fff",
			drawMathDeviation: "stddev",
			deviationStrokeColor: "#000",
			deviationWidth: 5,
			data : [60,70,75,65,75,80,65],
      title : "line 1"
		}
	]
}

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