dygraphs is a fast, flexible open source JavaScript charting library.
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Features:
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-Handles huge data sets: dygraphs plots millions of points without getting bogged down.
Interactive out of the box: zoom, pan and mouseover are on by default.
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- Strong support for error bars / confidence intervals.
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- Highly customizable: using options and custom callbacks, you can make dygraphs do almost anything.
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- dygraphs is works in all recent browsers. You can even pinch to zoom on mobile/tablet devices!
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- There's an active community developing and supporting dygraphs.