Published
Edited
Feb 6, 2022
Week4 Reflection
<p>I use the same data from homework1 to show what I learn this week.</p>
dataCsv = `app_name,downloads,average_rating,thirty_day_keep
Cardify,105707,4.95,94.73
Duobam,481340,4.88,84.09
Trippledex,81464,4.67,94.98
Veribet,205046,4.6,80.86
Span,533218,4.66,91.42
Greenlam,691552,4.96,70.98
DoubleyDo,990365,4.75,85.11
Prodder,170564,4.85,75.11
Cookley,498787,4.87,82.39
Flexidy,570023,4.88,72.86
Ronstring,709601,4.98,81.31
Cardonia,74369,4.7,81.62
Bitwolf,375372,4.96,85.44
Sonair,941836,4.78,72.88
Quo Lux,469201,4.99,71.52
Solarbreeze,276653,4.78,79.35
Transcof,654739,4.57,98.19
Veribot,867917,4.89,72.39
Zontrax,760672,4.81,82.64
Stim,750826,4.86,80.51`
data = d3.csvParse(dataCsv)
d3 = require("d3@7")
<h1>Sample 1</h1>
makeChart4 = (dataset) => {
const yGap = 24;
const w = 1000;
const h = dataset.length * yGap;
const chart4Svg = d3.create("svg")
.attr('width', w)
.attr('height', h);
const xScale = d3
.scaleLinear()
.domain([0, d3.max(dataset, (d) => d.downloads )])
.rangeRound([0, w - 100]);
const yScale = d3
.scaleLinear()
.domain([100, 0])
.rangeRound([40, h - 40]);
const rScale = d3
.scaleSqrt()
.domain([d3.min(dataset, (d) => d.thirty_day_keep), d3.max(dataset, (d) => d.thirty_day_keep)])
.rangeRound([1, 10]);
// FILL IN HERE, and observe changes below
chart4Svg
.selectAll("circle")
.data(dataset)
.join("circle")
.attr("fill","#a3a4a6")
.attr("cx", (d) => xScale(d.downloads))
.attr("cy",(d) => yScale(d.thirty_day_keep))
.attr("r", (d) => rScale(d.thirty_day_keep));
chart4Svg
.selectAll("text")
.data(dataset)
.join("text")
.text(d => d.app_name)
.attr("x", (d) => xScale(d.downloads))
.attr("y",(d) => yScale(d.thirty_day_keep))
.attr("font-family", "Arial")
.attr("fill","#f8e561");
chart4Svg
.append("g")
.attr("class", "axis")
.attr("transform", `translate(40, ${h - 20})`)
.call(d3.axisBottom(xScale));
chart4Svg
.append("g")
.attr("class", "axis")
.attr("transform", `translate(40,20)`)
.call(d3.axisLeft(yScale).tickSize(0).tickFormat(d => d + "%"));
return chart4Svg.node();
}
makeChart4(data)
<p>This is the first version of the table. I have written the Domain parameter setting range as 0-100. this allows the user to see the complete data from 0 to 100. But in fact, the user can't see all the data because the distance from point to point is too close. The points themselves have size and the distance between them is too narrow. This results in no way for the user to see what the dots represent.
<h1>Sample2<h1>
makeChart5 = (dataset) => {
const yGap = 50;
const w = 1000;
const h = dataset.length * yGap;
const chart5Svg = d3.create("svg")
.attr('width', w)
.attr('height', h);
const xScale = d3
.scaleLinear()
.domain([0, d3.max(dataset, (d) => d.downloads )])
.rangeRound([0, w - 100]);
const yScale = d3
.scaleLinear()
.domain([100, 70])
.rangeRound([40, h - 40]);
const rScale = d3
.scaleSqrt()
.domain([d3.min(dataset, (d) => d.thirty_day_keep), d3.max(dataset, (d) => d.thirty_day_keep)])
.rangeRound([1, 10]);
// FILL IN HERE, and observe changes below
chart5Svg
.selectAll("circle")
.data(dataset)
.join("circle")
.attr("fill","#a3a4a6")
.attr("cx", (d) => xScale(d.downloads))
.attr("cy",(d) => yScale(d.thirty_day_keep))
.attr("r", (d) => rScale(d.thirty_day_keep));
chart5Svg
.selectAll("text")
.data(dataset)
.join("text")
.text(d => d.app_name)
.attr("x", (d) => xScale(d.downloads))
.attr("y",(d) => yScale(d.thirty_day_keep))
.attr("font-family", "Arial")
.attr("fill","#f8e561");
chart5Svg
.append("g")
.attr("class", "axis")
.attr("transform", `translate(40, ${h - 20})`)
.call(d3.axisBottom(xScale));
chart5Svg
.append("g")
.attr("class", "axis")
.attr("transform", `translate(40,20)`)
.call(d3.axisLeft(yScale).tickSize(0).tickFormat(d => d + "%"));
return chart5Svg.node();
}
makeChart5(data)
<p>In this version of the chart I only show the points between 70% and 100%, which in fact covers all the points. Because I have narrowed the display, there is more space available for each point. This makes the points less dense. The user can easily read this chart.</p>
<p>Since no points would appear below 70%, I considered this to be useless space, so I omitted them.</p>
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