I use d3 to plot the scatter plot, and the set of i values for the x and y axes has positive and negative values. This is my first attempt to use d3, and I collected from introductory tutorials such as On the tenth day of Xmas, get dirty with d3.js data that the key correctly sets the x and y scales.
Next, I found this lesson: A bar chart with negative values that almost helped me fix it (I think). My dataset is too large to fit here, but here is the code on which I have a sample of my data to work with:
<div id="compareAll"></div>
<script>
window.onload = function() {
var dataSet = [ [4,4], [-4,4], [-4,-4], [4,-4], ];
var x0 = Math.max(-d3.min(dataSet[0]), d3.max(dataSet[0]));
var xScale = d3.scale.ordinal()
.domain([-x0,x0])
.range([0,10]);
var yScale = d3.scale.ordinal()
.domain(d3.range(dataSet[1])
.rangeRoundBands([0,10]);
var svg = d3.select("#compareAll")
.append("svg")
.attr("width", 10)
.attr("height",10)
svg.selectAll("circle")
.data(dataSet)
.enter()
.append("circle")
.attr("cx", function(d) {
return xScale(d[0]);
})
.attr("cy", function(d) {
return yScale(d[1]);
})
.attr("r",4);
var xAxis = d3.svg.axis()
.scale(xScale)
.tickSize(1);
var yAxis = d3.svg.axis()
.scale(yScale)
.tickSize(1);
svg.append("svg:g")
.attr("class", "x axis")
.attr("transform", "translate(0,10)")
.call(xAxis);
svg.append("svg:g")
.attr("class", "y axis")
.attr("transform", "translate(10,0)")
.call(yAxis);
}
</script>
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!