Highcharts Error #14

String value sent to series.data, expected Number

This happens if you pass in a string as a data point, for example in a setup like this:

series: [{
	data: ["3", "5", "1", "6"]

Highcharts expects the data values to be numbers. The most common reason for this is that data is parsed from CSV or from a XML source, and the implementer forgot to run parseFloat on the parsed value.

For performance reasons internal type casting is not performed, and only the first value is checked (since 2.3).