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Last active May 7, 2017 02:29
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Horsey Race
Raw
.block
license: mit
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.x.axis path,.x.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.y.axis path {
fill: none;
}
.y.axis line {
fill: none;
stroke: #eeeeee;
shape-rendering: crispEdges;
}
.date {
font: 500 196px "Helvetica Neue";
fill: #aaa;
}
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 80, bottom: 0, left: 30},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var speed = 200;
var x = d3.scale.linear()
.range([0, width-70]);
var y = d3.scale.ordinal()
.rangeRoundBands([height, 0], .1);
var xAxis = d3.svg.axis()
.scale(x)
.tickSize(0)
.orient("top");
var yAxis = d3.svg.axis()
.scale(y)
.tickSize(-width)
.tickPadding(10)
.orient("left");
var line = d3.svg.line()
.x(function(d) { return x(d.matchday); })
.y(function(d) { return y(d.position) + y.rangeBand()/2; });
var svg = d3.select('body').append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var clip = svg.append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", 0)
.attr("height", height);
function rand_step(probability){
return Math.random() < probability ? 1: -1 //if the horseys are more lazy than directionally challenged, make this 0
};
function run_race(race_length){
horsey_probabilities = [.52,.54,.56,.58,.60,.62,.64,.66,.68,.70,.72,.74,.76,.78,.80,.82,.84,.86,.88,.90].reverse()
horsey_paths = [[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]]
winning_position = 0
while (winning_position < race_length) {
new_steps = horsey_probabilities.map(function(d){return rand_step(d)})
horsey_paths.map(function (list, idx) {
return list.push(new_steps[idx]);});
winning_position = Math.max.apply(Math, horsey_paths.map(function(d){return d.reduce((a, b) => a + b, 0)}))
// console.log(winning_position);
}
return horsey_paths
}
function compute_rankings(paths){
// paths = [[1,0,1,0],[0,1,1,1]]
step_sums = paths.map(function(list){
return list.map(function (i,idx){
return list.slice(0,idx+1).reduce(function(acc, val) {
return acc + val; })})
})
// console.log(step_sums)
convert_list_to_ranks([5,2,4,2,3,0]);
rankings = matrix_transpose(
matrix_transpose(step_sums)
.map(function (col){
return convert_list_to_ranks(col)
}));
rank_dict = rankings.map(function (horsey, horsey_idx){
return horsey.map(function (position, day) {
return {"matchday": day, "position": position, "steps": step_sums[horsey_idx][day]}
})
});
// console.log(rank_dict);
horsey_colors = ["#0162A6", "#014689", "#041C42", "#EA0001", "#CD003B", "#E00016", "#F5D30F", "#C91119", "#F58113", "#013893", "#0898D7", "#B0053A", "#EE2722", "#F36F21", "#FFD600", "#D4082D", "#B41309", "#E13328", "#269045", "#6F5B98"]
standings_list = rank_dict.map(function (horsey_standings, horsey_number){
return {"teamName": "Horsey"+(horsey_number+1),
"color": horsey_colors[horsey_number],
"rank": horsey_standings
}
});
// console.log(standings_list)
return standings_list
}
function matrix_transpose(matrix){
return matrix[0].map(function(col, i) {
return matrix.map(function(row) {
return row[i];
});
});
}
function convert_list_to_ranks(list_of_sums){
output = list_of_sums.map(function (i,idx){return ([idx+1, i]);})
.sort(function(a,b) {return b[1] - a[1];})
.map(function (p,idy){return ([p[0], idy+1])})
.sort(function(a,b) {return a[0] - b[0];})
.map(function (x){return x[1]})
return output
}
function run_simulation(race_length){
paths = run_race(race_length);
// console.log(paths)
race_dictionary = {
"race": "Lucky Derby",
"standing": []
}
race_dictionary["standing"] = compute_rankings(paths);
return race_dictionary
};
function draw(data) {
y.domain(
d3.range(
1,21
).reverse()
);
x.domain(d3.extent(data.standing[0].rank.map(function(d) { return d.matchday; })));
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
svg.append("g")
.attr("class", "x axis")
.call(xAxis);
var club = svg.selectAll(".club")
.data(data.standing)
.enter().append("g")
.attr("class", "club");
var path = club.append("path")
.attr("class", "line")
.style("stroke", function(d) { return d.color; })
.style("stroke-width", 3)
.style("fill","none")
.attr("clip-path", function(d) { return "url(#clip)"; })
.attr("d", function(d) { return line(d.rank); });
var circleStart = club.append("circle")
.attr("cx", function(d) { return x(d.rank[0].matchday); })
.attr("cy", function(d) { return y(d.rank[0].position) + y.rangeBand()/2; })
.style("fill", function(d) { return d.color; })
.attr("r", 3)
var circleEnd = club
.append("circle")
.attr("cx", function(d) { return x(d.rank[0].matchday); })
.attr("cy", function(d) { return y(d.rank[0].position) + y.rangeBand()/2; })
.style("fill", function(d) { return d.color; })
.attr("r", 3)
var label = club.append("text")
.attr("transform", function(d) { return "translate(" + x(d.rank[0].matchday) + "," + (y(d.rank[0].position) + y.rangeBand()/2) + ")"; })
.attr("x", 8)
.attr("dy", ".31em")
.on("mouseover", function (d) {
club.style("opacity",0);
club.filter(function(path) {return path.teamName === d.teamName; }).style("opacity",1);
})
.on("mouseout", function (d) { club.style("opacity",1); })
.style("cursor","pointer")
.style("fill", function(d) { return d.color; })
.style("font-weight", "bold")
.text(function(d) { return "🏇 #"+ d.rank[0].position + " " + d.teamName + " Steps:" + d.rank[0].steps; });
var matchday = 1;
var transition = d3.transition()
.duration(speed)
.each("start", function start() {
label.transition()
.duration(speed)
.ease('linear')
.attr("transform", function(d) { return "translate(" + x(d.rank[matchday].matchday) + "," + (y(d.rank[matchday].position) + y.rangeBand()/2) + ")"; })
.text(function(d) { return "🏇 #"+ d.rank[matchday].position + " " + d.teamName + " Steps:" + d.rank[matchday].steps; });
circleEnd.transition()
.duration(speed)
.ease('linear')
.attr("cx", function(d) { return x(d.rank[matchday].matchday); })
.attr("cy", function(d) { return y(d.rank[matchday].position) + y.rangeBand()/2; });
clip.transition()
.duration(speed)
.ease('linear')
.attr("width", x(matchday+1))
.attr("height", height);
matchday+=1;
if (matchday !== data.standing[0].rank.length) transition = transition.transition().each("start", start);
});
};
draw(run_simulation(200));
</script>
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