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Highcharts (free for non-commercial) has heat maps: http://www.highcharts.com/demo/heatmap http://www.highcharts.com/demo/heatmap
by bradleyboy 12y ago
Highcharts (free for non-commercial) has heat maps:
http://www.highcharts.com/demo/heatmap http://www.highcharts.com/demo/heatmap