CODEWITHSUNDEEP
javascriptd3.js
imrane
imrane

Reputation: 1542

Handling Removal of Elements with Data Join in D3.js

I have a set of circles on a graph with the following data and using the date, as each circles key:

data = [
 {date: '2012-01-01', amount: 100 },
 {date: '2012-01-02', amount: 200 },
 {date: '2012-01-03', amount: 300 },
 {date: '2012-01-04', amount: 400 },
 {date: '2012-01-05', amount: 500 }
]

var circles = container.selectAll("g.circles")
    .data(data, function(d){ return d.date; });

// ENTER
circles.enter().append("circle")
  .attr("class","live")
  .attr("cy", function(d){return yScale(y(d,i)); })
  .attr("cx", function(d){return xScale(x(d,i)); })
.transition(500)
  .delay(function(d,i){return i*50;})
  .style("display",function(d){ return y(d,i) === null ? 'none' : 'inline'; })
  .attr("r", radius - 3 )
  .attr("fill", "#f7f7f7")
  .attr('clip-path','url(#rpm-clip2)')
  .each("end", events);

// TRANSITION
d3.transition(circles)
  .attr("cy", function(d){return yScale(y(d,i)); })
  .attr("cx", function(d){return xScale(x(d,i)); });

I then reload data with the following data set:

data = [
 {date: '2012-01-01', amount: 200 },
 {date: '2012-01-02', amount: 300 },
 {date: '2012-01-03', amount: 400 },
]

As you'll notice, this data set is shorter. I would like the dates that are missing to be removed but they aren't touched in the update. Any ideas?

Upvotes: 2

Views: 1318

Answers (1)

Felix Kling
Felix Kling

Reputation: 816334

You have to explicitly remove them. The .exit() collection contains all nodes that don't have data:

circles.exit().remove();

https://github.com/mbostock/d3/wiki/Selections#wiki-exit

Upvotes: 3

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