var dataset = [];
for(var i = 0; i < 25; i++) {
var p = [Math.floor(Math.random() * w), Math.floor(Math.random() * h) ];
dataset.push(p);
}
var getX = function(d) { return d[0]; };
var getY = function(d) { return d[1]; };
var h = 400, w = 1000, padding = 20;
var xScale = d3.scale.linear()
.domain([d3.min(dataset, getX), d3.max(dataset, getX)])
.range([padding, w - 4 * padding]);
var yScale = d3.scale.linear()
.domain([d3.min(dataset, getY), d3.max(dataset, getY)])
.range([h - padding, padding]);
var svg = d3.select("div#scale-ex1").append("svg")
.attr("width", w)
.attr("height", h);
var getScaledValue = function(extracter, scale) {
return function(d) { return scale(extracter(d)) };
};
svg.selectAll("circle")
.data(dataset)
.enter()
.append("circle")
.attr("cx", getScaledValue(getX, xScale))
.attr("cy", getScaledValue(getY, yScale))
.attr("r", 20);
svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.attr("x", getScaledValue(getX, xScale))
.attr("y", getScaledValue(getY, yScale))
.text(function(d, i) { return "(" + d[0] + ", "+ d[1] + ")"; })
.attr("fill", "red");
Last active
August 29, 2015 14:27
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