通过刷图返回Focus + Context的日期值

Question

I am doing twitter sentiment analysis, where it will show the overall area graph and i would be able to select the range of dates and pick out all or some of the tweets that is within the range.

I am trying to generate a tweet box by using the date slider from the sub chart at Focus+Context via Brushing .

I have the Focus+Context via Brushing working but i have no idea how to return the date value of the sub chart.

Date slider using Jquery seems to look good but the slider must affect the graph too and the tweetbox.

Answer 1

As the user "brushes" the sub chart you just want the date range of the selection?

Look at the brushed function in the example:

function brushed() {
  x.domain(brush.empty() ? x2.domain() : brush.extent());
  focus.select(".area").attr("d", area);
  focus.select(".x.axis").call(xAxis);
}

brush.extent is an array of two values, startDate and endDate of the selection. Here's a console.log of a random brush.extent :

[Tue Mar 26 2002 20:46:48 GMT-0400 (Eastern Daylight Time), Fri Apr 18 2003 09:10:32 GMT-0400 (Eastern Daylight Time)]