I am currently trying to implement a graph on a website from a raw set of data stored in an excel file. I am just at a loss of how to start an implementation of this.
I do know that I will have to use HTML5 and AJAX most likely to make the graph interactive. But that is as far as my knowledge goes. I have experience using AJAX and HTML, but I have never used HTML5. So I am pretty unfamiliar with the canvas tag.
In my research I have come across a few tools such as http://www.rgraph.net/, to make implementation easier. However, this is for personal use only and cannot be used commercially for free. So I am forced to come up with this on my own.
Can anyone give me a good idea where to start and or point me in the direction of some tutorials to get the ball rolling.
Thanks.
As far as interactive charts go, I prefer to use google charts
Here is an Demo of how it would work:
Would come out looking like this:

Excel can export the data as a CSV, or XML file which I know you can integrate into google charts easily with little coding experience using AJAX calls.
Edit: Also if you post more details about your data, perhaps an example, I can provide some more help.