Can I get a license for this project?

Hi @Thamjith, thanks for your interest! You're free to use my project for non-commercial (not-for-profit) purposes, and attribution would be appreciated. I've added a license (LICENSE.md) for clarification.

Hello, how we can add tooltip on this graph (for example vertical line with information on point ) please to show the count on a particular point , thank you very much @robyngit

@om35, we used a variation on this chart in MetacatUI. It's a bar chart instead of line graph, but it includes tooltips with the count and date. Alternatively, an example like this one might be helpful!

Hello @robyngit i tried to convert code to v4 but i have this error , can you help me please :
Uncaught TypeError: e.range is not a function
at Function.Va.h.ticks (d3.v4.min.js:2)
at e (d3.v4.min.js:2)
at ut.call (d3.v4.min.js:2)
at common_behaviour (d3v4_clean.html:601)
at draw (d3v4_clean.html:590)
at ut.call (d3.v4.min.js:2)
at d3v4_clean.html:360

the code is available here :  https://jsfiddle.net/d7j6k09r/ please help me 

Hey @om35, here are the D3 v4 release notes. This is a good place to start when figuring out how to transition from version 3 to 4. If you haven't discovered it already, there are lots of great d3 examples on observable, maybe there's something there that would fit better with what you need, without having to modify it too much.

how do I make the x-axis show date and time too? Example, June 2 12:05:30 when zoom in?