D3 Small Multiples / Interactive Info Vis

UW iSchool Course INFO 474: focused on designing and building visualizations to better understand and communicate about pressing issues.

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Nov 9, 2020

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data = d3.csv(

'https://raw.githubusercontent.com/rfordatascience/tidytuesday/master/data/2020/2020-03-10/tuition_cost.csv',

d3.autoType

)

chart = {

const chart = d3.create("div");

const charts = chart

.selectAll("div")

.data([["All Schools", chart_data], ["All Schools 2", chart_data]])

.join("div")

.call(drawChart);

return chart.node();

}

// Let's fill in this function!

drawChart = ele => {

// Axes

const svg = ele

.append("svg")

.style("height", chart_height + "px")

.style("width", chart_width + "px");

svg.append("g").call(xAxis);

svg.append("g").call(yAxis);

// Axis labels, title

svg.append('text').call(xLabel);

svg.append('text').call(chartTitle);

svg.append('text').call(yLabel);

// Points

svg

.selectAll("circle")

.data(d => d[1]) // Use the data that was *already bound* to the parent "values", which is an array

.join("circle")

.call(drawPoint);

}

// Setting circle attributes

drawPoint = circle => {

circle

.attr("cx", d => x(d.x))

.attr("cy", d => y(d.y))

.attr("r", 5)

.style('opacity', .5);

}

by_type_data = d3

.group(chart_data, d => d.type)

data.filter(d => d.name == "University of Washington")[0].in_state_tuition

sm_chart = {

const wrapper = d3.create("div").style("display", "inline-block");

const charts = wrapper

.selectAll("div")

.data(by_type_data) // A map, that gets processed as an array of arrays, [key, values]

.join("div") // Any given div here has a single array as it's data [map-key, values]

.attr("nonsense", d => console.log(d))

.style("width", width / 2)

.style("display", "inline-block")

.call(drawChart);

return wrapper.node();

}

chart_height = 300

chart_width = 400

x = d3

.scaleLinear()

.domain(d3.extent(chart_data, d => d.x))

.range([margin.left, chart_width - margin.right])

y = d3

.scaleLinear()

.domain(d3.extent(chart_data, d => d.y))

.range([chart_height - margin.bottom, margin.top])

tickFormatter = d3.format("$.2s")

xAxis = g =>

.attr("transform", `translate(0,${chart_height - margin.bottom})`)

.call(d3.axisBottom(x).tickFormat(tickFormatter))

yAxis = g =>

.attr("transform", `translate(${margin.left},0)`)

.call(d3.axisLeft(y).tickFormat(tickFormatter))

xLabel = ele =>

ele

.text(d => "In state tuition")

.attr("x", (x.range()[1] - x.range()[0]) / 2)

.attr("y", chart_height - margin.bottom + 35)

.style('font-family', "sans-serif")

// .style("text-anchor", "middle")

.style("font-size", '14px')

chartTitle = ele =>

ele

.text(d => (d === undefined ? "Title" : d[0])) // here is the other (corresponding) tricky part!

.attr("transform", `translate(${chart_width / 2}, ${20})`)

.style("text-anchor", "middle")

.style('font-family', "sans-serif")

yLabel = ele =>

ele

.text("Out of State Tuition")

.attr(

"transform",

`translate(${margin.left - 40}, ${chart_height / 2})rotate(-90)`

)

.style("text-anchor", "middle")

.style('font-family', "sans-serif")

d3 = require("d3")

html`<style>

.chart-container {

display:inline-block;

}

</style>`

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