Currently, I am in search of a charting library that is preferably JavaScript-based (although Flash could work as well) and has the capability to display time series data as a line chart. Additionally, I need this library to allow users to drag points on the chart in order to modify the underlying data.
I have been informed that Excel can perform this same functionality, but I specifically require a web-based solution. Despite my research, popular charting libraries like Highcharts, amCharts, GoogleCharts, or dygraphs do not seem to offer this feature. While I have come across options such as WireIt or , these tools are more geared towards nodes and edges graphs rather than traditional chart drawing.
If you are aware of any existing solutions that meet my criteria, whether open-source or commercial, please share them with me. Your assistance is greatly appreciated.