The x-axis scale in d3 is malfunctioning

I'm categorizing data into groups such as rich, poor, and all. I'm using a dropdown to select these values to be displayed on a scatterplot. The first transition works correctly, with text labels appearing as expected. However, upon selecting another option and triggering the second transition, half of the circles disappear and subsequent transitions become jumbled. It only seems to work properly when the all option is selected, then the first transition works again but gets messed up after that.

Link to Codepen

function render someData {

        xScale
            .domain[
                d3.min(someData function(d) {
                    return +d.poorToys;
                }) 
                d3.max(someData function(d) {
                    return +d.poorToys;
                })
            ];

        yScale
            .domain[
                d3.min(someData function(d) {
                    return +d.richToys;
                }) 
                d3.max(someData function(d) {
                    return +d.richToys;
                })+ 20
            ];

        //Adding circles

... more code follows ...
  
}

The issue appears to begin here.

circles
        .enter()
        .append("circle")
        .attr("cx" function(d) {
           ...more code...
        })

... more code ...

    } else {
                svg.selectAll("text.labels")
                    .transition()
                    .duration(1000)
                    .style("opacity", 0)
                    .remove();


    }   

}

Answer №1

There seems to be a mistake in your code where you assigned the x axis a class of x_axis on line 57, but then attempted to select it as x.axis in your render function on line 179.

If you rectify that error, everything should function as intended.

svg
  .append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(" + -14 + "," + (height + 30) + ")")
  .call(xAxis);

Check out the updated Pen here

Answer №2

Aside from the axis issue pointed out by @ksav, your primary concern is the lack of label positioning. There are numerous labels in both rich and poor categories that need to be properly placed.

    var labels = svg.selectAll("text.labels")
        .data(someData, function(d){ return d.country; });

    labels
      .enter()
      .append("text")
        .attr("x", function(d){ return xScale(+d.poorToys); })
        .attr("y", function(d){ return yScale(+d.richToys); })
        .attr("dx", 2)
        .attr("dy", 1)
        .attr("class", "labels")
        .attr("opacity", 0)
        .style("fill", "white")
        .style("font-size", "8px")
        .text(function(d){ return d.country; })
      .merge(labels)
        .transition()
        .duration(2000)
        .attr("x", function(d){ return xScale(+d.poorToys); })
        .attr("y", function(d){ return yScale(+d.richToys); })
        .attr("opacity", 1);

Additionally, ensure that the circles are not positioned solely based on the selection.

circles
    .enter()
    .append("circle")
    .attr("cx", function(d) { return xScale(+d.poorToys); })
    .attr("cy", function(d) { return yScale(+d.richToys); })
    .attr("r", function(d) { return rad; })
    .style("fill", "red")
    .append("title")
    .text(function(d) {
        return d.country + " reports books for " + d.poorToys + "% in poor areas and " + d.richToys + "% in rich areas.";
    });

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