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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<div id="chart"></div> |
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<style> |
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body { |
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font: 10px Arial; |
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} |
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.view { |
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fill: rgba(255, 255, 255, 0.2); |
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} |
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.axis path { |
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display: none; |
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} |
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.axis line { |
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stroke-opacity: 0.3; |
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} |
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.line { |
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fill: none; |
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stroke: steelblue; |
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stroke-width: 1.5px; |
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} |
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button { |
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position: absolute; |
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top: 20px; |
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left: 80px; |
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} |
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</style> |
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<body> |
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<button>Reset</button> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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var margin = {top: 20, right: 20, bottom: 50, left: 50}, |
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width = 1000 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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var parseTime = d3.timeParse("%d/%m/%Y %H:%M"); |
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bisectDate = d3.bisector(function(d) { return d.dt; }).left; |
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formatValue = d3.format(",.2f"), |
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formatCurrency = function(d) { return "£" + formatValue(d); }; |
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var x = d3.scaleTime() |
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.range([0, width]); |
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var y = d3.scaleLinear() |
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.range([height, 0]); |
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var priceSeries = d3.line() |
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.defined(function(d) { return d.price != 0; }) |
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.x(function(d) { return x(d.dt); }) |
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.y(function(d) { return y(d.price); }); |
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svg = d3.select('#chart') |
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.append("svg:svg") |
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.attr('width', width + margin.left + margin.right) |
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.attr('height', height + margin.top + margin.bottom) |
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.append("svg:g") |
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.attr("id","group") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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var focus = svg.append("g") |
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.style("display", "none") |
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// Get the data |
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d3.csv("data.csv", function(error, data) { |
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if (error) throw error; |
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// format the data |
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data.forEach(function(d,i) { |
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d.dt = parseTime(d.dt); |
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d.price = +d.price; |
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}); |
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// Scale the range of the data |
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console.log("Date range: ", d3.extent(data, function(d) { return d.dt; })); |
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console.log("Price range: ", d3.extent(data, function(d) { return +d.price; })); |
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x.domain(d3.extent(data, function(d) { return d.dt; })); |
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y.domain(d3.extent(data, function(d) { return d.price; })); |
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var zoom = d3.zoom() |
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.scaleExtent([0.75, 15000]) |
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.translateExtent([[-100000, -100000], [100000, 100000]]) |
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.on("zoom", zoomed); |
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var xAxis = d3.axisBottom(x) |
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.ticks((width + 2) / (height + 2) * 5) |
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.tickSize(-height) |
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.tickPadding(10); |
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var yAxis = d3.axisRight(y) |
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.ticks(5) |
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.tickSize(width) |
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.tickPadding(- 20 - width); |
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svg.append("text") |
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.attr("transform", |
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"translate(" + (width/2) + " ," + (height + margin.top + 20) + ")") |
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.style("font-size","12px") |
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.style("font-family", "sans-serif") |
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.style("text-anchor", "middle") |
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.text("Date/Time"); |
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svg.append("text") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 0 - margin.left/1.2) |
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.attr("x",0 - (height / 2)) |
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.attr("dy", "1em") |
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.style("font-size","12px") |
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.style("text-anchor", "middle") |
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.text("Price"); |
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var view = svg.append("rect") |
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.attr("class", "view") |
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.attr("x", 0.5) |
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.attr("y", 0.5) |
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.attr("width", width - 1) |
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.attr("height", height - 1); |
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var gX = svg.append("g") |
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.attr("class", "axis axis--x") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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var gY = svg.append("g") |
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.attr("class", "axis axis--y") |
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.call(yAxis); |
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svg.append("defs").append("clipPath") |
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.attr("id", "clip") |
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.append("rect") |
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.attr("width", width) |
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.attr("height", height); |
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var chartBody = svg.append("g") |
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.attr("clip-path", "url(#clip)"); |
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focus.append("circle") |
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.attr("class", "y") |
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.style("fill", "none") |
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.style("stroke", "steelblue") |
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.attr("r", 4) |
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.attr("clip-path", "url(#clip)"); |
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focus.append("text") |
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.attr("dy", ".35em") |
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.attr("clip-path", "url(#clip)"); |
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chartBody.append("svg:path") |
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.data([data]) |
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.attr("class", "line") |
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.attr("d", priceSeries); |
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svg.append("rect") |
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.attr("id","rect") |
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.attr("width", width) |
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.attr("height", height) |
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.style("fill", "none") |
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.style("pointer-events", "all") |
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.on("mouseover", function() { focus.style("display", null); }) |
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.on("mouseout", function() { focus.style("display", "none"); }) |
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.on("mousemove", mousemove); |
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svg.append("g") |
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.attr("transform", "translate(0," + height + ")") |
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.call(d3.axisBottom(x).ticks(0)); |
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svg.append("g") |
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.call(d3.axisLeft(y).ticks(0)); |
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d3.select("#rect").call(zoom); |
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d3.select("button").on("click", resetted); |
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function mouseDate(scale) { |
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var g = d3.select("#group")._groups[0][0] |
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var x0 = scale.invert(d3.mouse(g)[0]), |
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i = bisectDate(data, x0, 1), |
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d0 = data[i - 1], |
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d1 = data[i], |
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d = x0 - d0.date > d1.date - x0 ? d1 : d0; |
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return d; |
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} |
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function mousemove() { |
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var transform = d3.zoomTransform(this); |
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var xt = transform.rescaleX(x), yt = transform.rescaleY(y); |
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d = mouseDate(xt); |
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focus.select("circle.y") |
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.attr('cx', function() { |
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return transform.applyX(x(d.dt)); |
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}) |
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.attr('cy', function() { |
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return transform.applyY(y(d.price)); |
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}); |
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focus.select("text") |
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.text(formatCurrency(d.price)) |
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.attr('x', function() { |
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return transform.applyX(x(d.dt))+10; |
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}) |
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.attr('y', function() { |
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return transform.applyY(y(d.price)); |
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}); |
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} |
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function zoomed() { |
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gX.call(xAxis.scale(d3.event.transform.rescaleX(x))); |
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gY.call(yAxis.scale(d3.event.transform.rescaleY(y))); |
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var t = d3.event.transform, xt = t.rescaleX(x), yt = t.rescaleY(y) |
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svg.select(".line") |
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.attr("d",priceSeries.x(function(d) { return xt(d.dt);}) |
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.y(function(d) { return yt(d.price);})); |
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//d = mouseDate(x); |
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focus.select("circle.y") |
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.classed("zoomed", true) |
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.attr("id","one") |
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.attr('cx', function() {return t.applyX(x(d.dt)); }) |
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.attr('cy', function() {return t.applyY(y(d.price)); }); |
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focus.select("text") |
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.text(formatCurrency(d.price)) |
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.attr('x', function() { return t.applyX(x(d.dt))+10;}) |
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.attr('y',function() {return t.applyY(y(d.price)); }); |
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} |
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function resetted() { |
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d3.select("#rect").transition() |
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.duration(750) |
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.call(zoom.transform, d3.zoomIdentity); |
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} |
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}); |
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</script> |
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</body> |