JDR VI10 for CS725@ODU

README.md

Name: Joel D. Rodriguez-Ortiz

Usage

The bottom view is a scatterplot matrix of all the numerical values of the football data set. This view can be panned by dragging with the mouse and zoomed in and out with the mouse scroll wheel. Double-clicking on any of the scatterplots in the matrix will update the (upper) juxtaposed view with the selected scatterplot. Points in this plot can also be clicked to show player details in the corner. The details shown in the corner are filtered by the plot selected from the matrix, they will match the axes shown in the currently selected scatterplot.

Notes

The original intent of this idea was implementing juxtaposed, coordinated, side-by-side (top-to-bottom in this case) views. The views share a subset of the data in an overview/detail type fashion.

For the longest time now I've been wanting to use other attributes from the football data set other than Passing Yards vs Passing Attempts. And scatterplot matrices are a perfect example of the small multiples idiom discussed in CH12. So I thought why not just plot all the attributes of the dataset?!

The idea was that you would use the scatterplot matrix to search for trends of interest. But, by providing the ability to pan, I wouldn't have to limit the number of attributes in the matrix. In essence you were also using it as a bird's eye map, to hone in on a combination of attributes that exhibited a strong relation to each other and then shifting your attention to the detailed view (akin to the CH6 Overview First Details Later rule of thumb). Scatterplot matrices are also an example of small multiples, another idiom discussed in CH12.

The implementation worked more or less as I wanted, but ran into a problem mentioned repeatedly in the chapter: screen real estate (this may have been made worse by working with a bl.ocks.org block). I wound up making the detailed view slightly smaller than I originally wanted to and had to stack them vertically because horizontally they looked odd inside the block. I placed the scatterplot matrix below the detailed view as if they were navigation controls. In the end both views fit into the screen and exercise juxtaposed views as originally intended. The navigation flow should go from searching for trends in the scatterplot matrix, to selecting a scatterplot showing attributes of interest, to further inspecting individual values within the scatterplot.

color_map.js

// http://colorbrewer2.org/

function ColorMap()
{
    // public
    this.byConference = function(conference) // no restrictions
    {
        if (bigFive.indexOf(conference) >= 0)
        {
            return colors[0];
        }
        if (groupOfFive.indexOf(conference) >= 0)
        {
            return colors[1];
        }
        return colors[2];
    };

    this.getConferenceColors = function()
    {
        return [
            { category: 'Big Five', color: colors[0] },
            { category: 'Group Of Five', color: colors[1] },
            { category: 'Independent', color: colors[2] }
        ];
    };

    // private variables
    var bigFive = [ 'SEC', 'ACC', 'Big 12', 'Pac-12', 'Big Ten' ];
    var groupOfFive = [ 'American', 'Sun Belt', 'MWC', 'MAC', 'CUSA' ];
    var colors = [ '#e41a1c', '#377eb8', '#4daf4a' ];
}

d3.min.js

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arguments.length?(c&&s?(g=!!t[0],p=!!t[1]):c?g=!!t:s&&(p=!!t),n):c&&s?[g,p]:c?g:s?p:null},n.extent=function(t){var e,r,u,i,l;return arguments.length?(c&&(e=t[0],r=t[1],s&&(e=e[0],r=r[0]),a=[e,r],c.invert&&(e=c(e),r=c(r)),e>r&&(l=e,e=r,r=l),(e!=f[0]||r!=f[1])&&(f=[e,r])),s&&(u=t[0],i=t[1],c&&(u=u[1],i=i[1]),o=[u,i],s.invert&&(u=s(u),i=s(i)),u>i&&(l=u,u=i,i=l),(u!=h[0]||i!=h[1])&&(h=[u,i])),n):(c&&(a?(e=a[0],r=a[1]):(e=f[0],r=f[1],c.invert&&(e=c.invert(e),r=c.invert(r)),e>r&&(l=e,e=r,r=l))),s&&(o?(u=o[0],i=o[1]):(u=h[0],i=h[1],s.invert&&(u=s.invert(u),i=s.invert(i)),u>i&&(l=u,u=i,i=l))),c&&s?[[e,u],[r,i]]:c?[e,r]:s&&[u,i])},n.clear=function(){return n.empty()||(f=[0,0],h=[0,0],a=o=null),n},n.empty=function(){return!!c&&f[0]==f[1]||!!s&&h[0]==h[1]},oa.rebind(n,l,"on")};var 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1!=n.getDate()}],["%B",function(n){return n.getMonth()}],["%Y",zt]]),tc={range:function(n,t,e){return oa.range(Math.ceil(n/e)*e,+t,e).map(ua)},floor:y,ceil:y};Ql.year=go.year,go.scale=function(){return ra(oa.scale.linear(),Ql,nc)};var ec=Ql.map(function(n){return[n[0].utc,n[1]]}),rc=Jl.multi([[".%L",function(n){return n.getUTCMilliseconds()}],[":%S",function(n){return n.getUTCSeconds()}],["%I:%M",function(n){return n.getUTCMinutes()}],["%I %p",function(n){return n.getUTCHours()}],["%a %d",function(n){return n.getUTCDay()&&1!=n.getUTCDate()}],["%b %d",function(n){return 1!=n.getUTCDate()}],["%B",function(n){return n.getUTCMonth()}],["%Y",zt]]);ec.year=go.year.utc,go.scale.utc=function(){return ra(oa.scale.linear(),ec,rc)},oa.text=An(function(n){return n.responseText}),oa.json=function(n,t){return Cn(n,"application/json",ia,t)},oa.html=function(n,t){return Cn(n,"text/html",aa,t)},oa.xml=An(function(n){return n.responseXML}),"function"==typeof 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detail.js

function Detail(g,  // <g></g>
                gw, // group width
                gh, // group height
                dw, // detail width
                dh, // detail height
                dp, // detail padding
                fs, // font size
                fp) // font padding
{
    this.update = function(details) {
        // create text
        if (text == null)
        {
            text = detail.selectAll('text')
                .data(details)
                .enter()
                .append('text')
                .text(function(d) { return d; })
                .attr('transform', function(d, i) {
                    var x = 3;
                    var y = (fontSize + fontPadding) * i;
                    y += tweak;
                    return 'translate(' + x + ',' + y + ')';
                })
                .style({
                    'font-family': 'sans-serif',
                    'font-size': fontSize + 'px'
                });
        }
        else
        {
            // update text
            text.data(details)
                .text(function (d) { return d; });
        }
    };

    var groupWidth = gw;
    var groupHeight = gh;
    var width = dw;
    var height = dh;
    var padding = dp || 50;
    var fontSize = fs || 12;
    var fontPadding = fp || 3;
    var tweak = 16;
    var detail = g.append('g')
        .attr('class', 'detail')
        .attr('transform', 'translate(' + (groupWidth - width - padding) + ',' 
                                        + (groupHeight - height - padding) + ')');

    detail.append('rect')
        .attr('width', width)
        .attr('height', height)
        .attr('fill', 'none')
        .attr('stroke', 'black');

    var text = null;
}

index.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>Homework</title>
        <script src="d3.min.js" type="text/javascript"></script>
        <script src="color_map.js" type="text/javascript"></script>
        <script src="detail.js" type="text/javascript"></script>
        <script src="legend.js" type="text/javascript"></script>
        <script src="scatterplot.js" type="text/javascript"></script>
        <script src="setup.js" type="text/javascript"></script>
        <link href="main.css" rel="stylesheet" type="text/css" />
    </head>
    <body style="text-align: center;">
        <div id="chart1" class="chart-div">
        </div>
        <div id="chart0" class="chart-div">
        </div>
        <script src="main.js" type="text/javascript"></script>
    </body>
</html>

legend.js

function Legend(g,  // <g></g>
                mw, // mark width
                mh, // mark height
                mp) // mark padding
{
    mw = mw || 25;
    mh = mh || 25;
    mp = mp || 10;

    // public 
    this.draw = function(marks)
    {
        var m = group.selectAll('.legend')
            .data(marks)
            .enter()
            .append('g')
            .attr('class', 'legend');

        m.append('rect')
            .attr('x', 0)
            .attr('y', function(d, i) {
                return (markHeight + markPadding) * i;
            })
            .attr('width', markWidth)
            .attr('height', markHeight)
            .attr('fill', function(d) {
                return d.color;
            });

        m.append('text')
            .attr('transform', function(d, i) {
                var x = markWidth + markPadding;
                var y = (markHeight + markPadding) * i;
                y += tweak;
                return 'translate(' + x + ',' + y + ')';
            })
            .attr('class', 'legend-text')
            .text(function(d) {
                return d.category;
            });
    };

    // private 
    var group = g;
    var markWidth = mw;
    var markHeight = mh;
    var markPadding = mp;
    var tweak = 16;
}

main.css

body
{
    cursor: default;
}

.small .axis path,
.small .axis line 
{
    fill: none;
    stroke: black;
    stroke-width: 0.25px;
    shape-rendering: crispEdges;
}

.small .axis text
{
    font-family: sans-serif;
    font-size: 2px;
}

.small .axis-title
{
    font-family: sans-serif;
}

text
{
    cursor: default;
}

.chart-div
{
    margin: 25px 25px 25px 25px;
    display: inline;
}

.small circle
{
    stroke: black;
    stroke-width: 0.15px;
}

.axis path,
.axis line
{
    fill: none;
    stroke: black;
    shape-rendering: crispEdges;
}

.axis text,
.legend-text
{
    font-family: sans-serif;
    font-size: 10px;
}

.hover-label
{
    font-family: sans-serif;
    font-size: 14px;
    font-weight: bold;
}

#chart1 circle
{
    stroke: black;
    stroke-width: 1px;
}

main.js

function createZoomableContainer(group, width, height) 
{
    var zoom = d3.behavior.zoom()
        .scaleExtent([ 0.90, 5 ])
        .on('zoom', zoomed);

    group.call(zoom);

    var rect = group.append('rect')
        .attr('width', width)
        .attr('height', height)
        .style('fill', 'none')
        .style('pointer-events', 'all');

    var container = group.append('g');

    function zoomed() 
    {
        container.attr('transform',
                       'translate(' + d3.event.translate + ')scale(' + 
                       d3.event.scale + ')');
    }

    group.on('dblclick.zoom', null);

    return container;
}

var raw = null;

d3.csv('passing_stats.csv', function(error, data)
{
    raw = data;
});

var id0 = window.setInterval(function() {
    if (raw != null)
    {
        var columns = [
            'Rk',
            'Cmp',
            'Passing Attempts',
            'Pct',
            'Passing Yards',
            'Y/A',
            'AY/A',
            'Passing TD',
            'Interceptions',
            'Rate',
            'Rushing Attempts',
            'Rushing Yards',
            'Rushing Avg',
            'Rushing TD'
        ];

        var absoluteWidth = 1000;
        var plotsPerRow = columns.length;
        var plotWidth = absoluteWidth / plotsPerRow;
        var plotHeight = absoluteWidth / plotsPerRow;
        var plotPadding = 10;
        var radius = 0.75;

        var viewportWidth = 800;
        var viewportHeight = 400;
        var svg = d3.select('#chart0')
            .append('svg')
            .attr('width', viewportWidth)
            .attr('height', viewportHeight);

        var container = createZoomableContainer(svg, viewportWidth, viewportHeight);

        var groups = [];
        for (var i = 0; i < columns.length * columns.length / plotsPerRow; ++i)
        {
            for (var j = 0; j < plotsPerRow; ++j)
            {
                var group = container.append('g')
                    .attr('transform', 'translate(' + plotWidth * j 
                          + ',' + plotHeight * i + ')')
                    .attr('class', 'small')
                    .on('dblclick', function() {
                        var axes = d3.select(this).attr('data').split(',');
                        drawDetailedView(axes[0], axes[1]);
                    });

                groups.push(group);
            }
        }

        var datasets = [];
        var color = new ColorMap();
        var k = 0;
        for (i = 0; i < columns.length; ++i)
        {
            for (j = 0; j < columns.length; ++j)
            {
                if (i != j)
                {
                    var dataset = [];
                    raw.forEach(function(v) {
                        dataset.push({
                            x: Number(v[columns[j]]),
                            y: Number(v[columns[i]]),
                            name: v['Player'],
                            conference: v['Conf'],
                            color: color.byConference(v['Conf']),
                            radius: radius,
                            layer: 0
                        });
                    });
                    datasets.push(dataset);
                }
                else
                {
                    datasets.push(columns[i]); // diagonal title
                }

                groups[k].attr('data', columns[j] + ',' + columns[i]);
                ++k;
            }
        }

        var fontSize = 10;
        datasets.forEach(function(ds, i) {
            if (typeof(ds) != 'string')
            {
                var scatterplot = new Scatterplot(
                    groups[i], datasets[i], plotWidth, plotHeight, plotPadding);

                groups[i].append('rect')
                    .attr('width', plotWidth)
                    .attr('height', plotHeight)
                    .style('fill', 'none')
                    .style('pointer-events', 'all');
                    scatterplot.draw();
            }
            else
            {
                var words = ds.split(' ');
                words.forEach(function(word, w) {
                    groups[i].append('text')
                        .attr('x', 0)
                        .attr('y', plotHeight / 2 + fontSize * w)
                        .attr('class', 'axis-title')
                        .text(word)
                        .attr('style', 'font-size: ' + fontSize + 'px');
                });
            }
        });

        window.clearInterval(id0);

        drawDetailedView('Passing Attempts', 'Passing Yards');
    }
}, 100);

function drawDetailedView(xaxis, yaxis)
{
    d3.select('#chart1').select('svg').remove();

    var width = 800;
    var height = 500;
    var padding = 50;

    var dataset = [];
    var color = new ColorMap();
    var radius = 5;
    raw.forEach(function(v) {
        dataset.push({
            x: Number(v[xaxis]),
            y: Number(v[yaxis]),
            name: v['Player'],
            conference: v['Conf'],
            color: color.byConference(v['Conf']),
            radius: radius,
            layer: 0
        });
    });

    var svg = d3.select('#chart1')
        .append('svg')
        .attr('width', width)
        .attr('height', height);

    var scatterplot = new Scatterplot(svg, dataset, width, height, padding);
    scatterplot.draw();
    scatterplot.makeHoverLabels(function(d) { return d.name; });
    scatterplot.drawAxisLabels(yaxis, xaxis);

    var lg = svg.append('g')
        .attr('transform', 'translate(100,50)');
    var legend = new Legend(lg);
    legend.draw(color.getConferenceColors());

    var last = null;
    var detail = new Detail(svg, 
                            width - padding,
                            height - padding,
                            width * 0.21,
                            height * 0.15, 
                            10, 9);
    scatterplot.each(function() {
        d3.select(this)
            .on('click', function(d) {
                if (last != null)
                {
                    last.color = color.byConference(last.conference);
                    last.radius = radius;
                    last.layer = 0;
                }
                d.color = 'orange';
                d.radius = radius * 2;
                d.layer = 1;
                last = d;
                scatterplot.draw();
                var details;
                raw.forEach(function(r) { 
                    if (d.name == r['Player'])
                    {
                        details = [
                            'Rank: ' + r['Rk'],
                            'Name: ' + r['Player'],
                            'School: ' + r['School'],
                            xaxis + ': ' + r[xaxis],
                            yaxis + ': ' + r[yaxis]
                        ];
                    }
                });
                if (details)
                {
                    detail.update(details);
                }
            });
    });
}

passing_stats.csv

scatterplot.js

function Scatterplot(g, // <g></g>
                     d, // object { x, y }
                     w, // width
                     h, // height
                     p, // padding
                     t, // ticks
                     r) // radius
{
    w = w || 640;
    h = h || 480;
    p = p || 50;
    t = t || 5;
    r = r || 4;

    // public
    this.draw = function()
    {
        // create the marks
        if (marks == null)
        {
            // create circles
            marks = group.selectAll('circle')
                .data(dataset)
                .enter()
                .append('circle')
                .attr('cx', function(d) {
                    return xScale(d.x);
                })
                .attr('cy', function(d) {
                    return yScale(d.y);
                })
                .attr('r', function(d) {
                    return d.radius || radius;
                })
                .style('fill', function(d) { return d.color; });

            // create x axis
            group.append('g')
                .attr('class', 'axis x-axis')
                .attr('transform', 'translate(0,' + (height - padding) + ')')
                .call(xAxis);

            // create y axis
            group.append('g')
                .attr('class', 'axis y-axis')
                .attr('transform', 'translate(' + padding + ',0)')
                .call(yAxis);
        }
        else
        {
            // update the marks
            marks.style('fill', function(d) { return d.color; })
                .attr('r', function(d) {
                    return d.radius || radius;
                });

            marks.sort(function(a, b) {
                if (a.layer != null && b.layer != null)
                {
                    return a.layer - b.layer;
                }
                return 0;
            });
        }
    };

    // read: returns text after reading the data
    this.makeHoverLabels = function(read)
    {
        if (hoverLabels == null)
        {
            hoverLabels = group.selectAll('.hover-label')
                .data(dataset)
                .enter()
                .append('text')
                .attr('class', 'hover-label')
                .attr('transform', function(d) {
                    return 'translate(' + (xScale(d.x) - 55) + ',' + 
                           (yScale(d.y) - 13) + ')';
                });

            marks.on('mouseover', function(d, i) {
                hoverLabels.each(function(d, j) {
                    if (i == j)
                    {
                        d3.select(this)
                            .text(function(d, i) {
                                return read(d, i);
                            });
                    }
                })
            })
            .on('mouseout', function(d, i) {
                hoverLabels.each(function(d, j) {
                    if (i == j)
                    {
                        d3.select(this).text('');
                    }
                })
            });
        }
    };

    this.drawAxisLabels = function(vertical, horizontal)
    {
        if (group != null)
        {
            group.select('.x-axis')
                .append('text')
                .attr('x', width * 0.80 / 2 )
                .attr('y', -5)
                .text(horizontal);

            group.select('.y-axis')
                .append('text')
                .attr('transform', 'rotate(-90)')
                .attr('x', -height * 1.10 / 2)
                .attr('y', 10)
                .text(vertical);
        }
    };

    // Invokes callback on each mark.
    this.each = function(callback)
    {
        if (marks != null)
        {
            marks.each(callback);
        }
    };

    // private
    var group = g;
    var dataset = d;
    var width = w;
    var height = h;
    var padding = p;
    var radius = r;
    var ticks = t;
    
    var xScale = d3.scale.linear()
        .domain([ d3.min(dataset, function(d) { return d.x }) - 50,
                  d3.max(dataset, function(d) { return d.x }) + 50])
        .range([ padding, width - padding * 2]); 

    var yScale = d3.scale.linear()
        .domain([ d3.min(dataset, function(d) { return d.y }) - 50,
                  d3.max(dataset, function(d) { return d.y }) + 50])
        .range([ height - padding, padding ]);

    var xAxis = d3.svg.axis()
        .scale(xScale)
        .orient('bottom')
        .ticks(ticks);

    var yAxis = d3.svg.axis()
        .scale(yScale)
        .orient('left')
        .ticks(ticks);

    var marks = null;
    var hoverLabels = null;
}

setup.js

// expand frame element
d3.select(self.frameElement).style('height', '1050px');