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<!doctype html>
<html lang="en">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<link href="/style.css" rel="stylesheet" type="text/css">
<script src='https://d3js.org/d3.v5.min.js'></script>
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
<title>The Titanic Tragedy - A Survival Analysis </title>
</head>
<!-- <style> circle {fill: lightblue; stroke: black;} </style> -->
<body>
<h1>The Titanic Tragedy - A Survival Analysis</h1>
<p> How did the survival rate relate to the age, gender and passenger class of the passengers ? </p>
<div class="container-fluid">
<div id="narrative-panel" class="panel panel-primary hidden">
<div class="panel-heading">
<div class="row">
<div id="narrative" class="col-md-12">
<div id="narrative-0"><strong>Hi! Welcome to this data visualization.</strong></div>
<div id="narrative-1"><strong>We will explore how the survival rate changes with age, sex and passenger class of passengers.</strong></div>
<div id="narrative-2"><strong>Let's first look at the age. The age information of <span class="rows-of-age-data"></span> passengers (out of the total <span class="rows-of-dataset"></span> passengers) are available in the dataset.</strong></div>
<div id="narrative-3"><strong>We will be able to see how survival rate changes with varying age range selection out of these <span class="rows-of-age-data"></span> records.</strong></div>
<div id="narrative-4"><strong>The selection first starts with 0, and gradually increases up to 10 (exclusive).</strong></div>
<div id="narrative-5"><strong>We can see the survival age of passengers below 10 is pretty high. It is always above 60%.</strong></div>
<div id="narrative-6"><strong>The selection now slowly increases up to the maximum age. Notice how the survival rate changes with the expanding selection.</strong></div>
<div id="narrative-7"><strong>Since the selection includes age 10 onwards, the survival rate has never been more than 60%.</strong></div>
<div id="narrative-8"><strong>We can see the overall trend is that, as the upper bound of the selection increases with age, survival rate decreases.</strong></div>
<div id="narrative-9"><strong>We can see the overall trend is that, as the upper bound of the selection increases with age, survival rate decreases.</strong></div>
<div id="narrative-10"><strong>Let's go back to the whole set of data (of all <span class="rows-of-dataset"></span> passengers). Next, we will see which sex group has the highest survival rate.</strong></div>
<div id="narrative-11"><strong>First, only the data of male passengers are selected.</strong></div>
<div id="narrative-12"><strong>Then, only the data of female passengers are selected.</strong></div>
<div id="narrative-13"><strong>It is obvious that the survival rate of female passengers is much higher than that of male passengers.</strong></div>
<div id="narrative-14"><strong>Finally, we are going to explore which passenger class has the highest survival rate.</strong></div>
<div id="narrative-15"><strong>First, only the data of passengers in lower class are selected.</strong></div>
<div id="narrative-16"><strong>Then, only the data of passengers in middle class are selected.</strong></div>
<div id="narrative-17"><strong>Lastly, only the data of passengers in upper class are selected.</strong></div>
<div id="narrative-18"><strong>It is obvious that the survival rate of passengers in upper class is much higher than those of other 2 classes.</strong></div>
<div id="narrative-19"><strong>We have finished watching the visualization of how survival rate changes with each of the three passengers' attributes.</strong></div>
<div id="narrative-20"><strong>You can now freely use the brush or click on the class label to explore the data in different combination of selection. Thanks for watching.</strong></div>
</div>
</div>
</div>
</div>
<div class="well well-sm">
<div id="survival-focus">
<div id="survival-focus-title">Survival statistics of the selected group of passengers</div>
<div id="survival" class="inline-block-align-top"></div>
<div id="survival-ratio" class="inline-block-align-top"></div>
</div>
</div>
<div id="current-data-selection" class="panel panel-info">
<div class="panel-heading"> <strong>Current data selection</strong>
<button type="button" id="reset-filter" class="btn btn-sm pull-right hidden"><strong>Reset data selection</strong></button>
</div>
<div class="panel-body">
<div class="row">
<div class="col-md-2 col-sm-6">No. of samples: <span class="current-rows-of-dataset selection-stats"></span></div>
<div class="col-md-4 col-sm-6">Age Range: <span class="hidden age-range"><span class="lower-age selection-stats"></span> (inclusive) to <span class="upper-age selection-stats"></span> (exclusive)</span> <span class="age-not-restricted-label">Not Restricted</span></div>
<div
class="col-md-3 col-sm-6">Sex: <span><span class="hidden selected-sex-label selection-stats"><span class="selected-male-label">Male</span> <span class="selected-female-label">Female</span></span> <span class="sex-not-restricted-label">Not Restricted</span></span>
</div>
<div class="col-md-3 col-sm-6">Passenger Class:<span><span id="selected-pclass-label" class="hidden selection-stats"><span class="selected-lower-label">Lower</span> <span class="selected-middle-label">Middle</span> <span class="selected-upper-label">Upper</span></span>
<span class="pclass-not-restricted-label">Not Restricted</span></span>
</div>
</div>
</div>
</div>
<div role="alert" id="interaction-explain" class="alert alert-success hidden"><span>You can interact with below charts and see how the survival rate shown above changes with your selection.</span>
<button type="button" class="close"><span>×</span></button>
</div>
<div class="row">
<div class="col-md-12">
<div><strong>A histogram of the distribution of ages of the passengers</strong>
<div class="interaction-help-text hidden">
<div>Select an area on the histogram to filter the data and see the effect.</div>
<div>(Note: Once the data is filtered by an age range, the data will not include all the passenger whose ages are unknown in the source data.)</div>
</div>
</div>
<div id="stacked-age-chart"></div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div class="inline-block-align-top">
<div><strong>A bar chart of the sex of passengers</strong>
<div class="interaction-help-text hidden">
<div>Click on the bar to do filtering</div>
</div>
</div>
<div id="stacked-sex-chart"></div>
</div>
<div class="inline-block-align-top">
<div><strong>A bar chart of the passenger class (travel class) of passengers</strong>
<div class="interaction-help-text hidden">
<div>Click on the bar to do filtering</div>
</div>
</div>
<div id="stacked-pclass-chart"></div>
</div>
</div>
</div>
</div>
<script>
$( document ).ready(function() {
"use strict";
/*
Common variables and constants
*/
var fullData, maxAge, minAge, isSexBarsClickable = false, isPclassBarsClickable = false,
interactionInitialized = false;
var survivalLabels = ["Survived", "Perished"], sexLabels = ["Female", "Male"],
pclassMap = {
1: "Upper",
2: "Middle",
3: "Lower"
}, {stackedAgeHistogram, stackedPclassBarChart, stackedSexBarChart, survivalChart, survivalStack} = {
survivalChart: {},
survivalStack: {},
ageHistogram: {},
sexChart: {},
pclassChart: {},
stackedAgeHistogram: {},
stackedSexBarChart: {},
stackedPclassBarChart: {}
}, dataFilters = {
ageRange: [],
sex: [],
pclass: []
};
/*
Common calculation functions
*/
function getSurvivalCount(data) {
const survived = d3.sum(data, function (d) {
return d.Survived;
});
return [{
category: "Survived",
count: survived
}, {
category: "Perished",
count: data.length - survived
}];
}
function getSexCount(data) {
const male = d3.sum(data, function (d) {
return +(d.Sex === "male");
});
return [{
category: "Male",
count: male
}, {
category: "Female",
count: data.length - male
}];
}
function getPclassCount(data) {
let upper = 0,
middle = 0,
lower = 0;
data.forEach(function (d) {
if (d.Pclass === 1) {
upper++;
} else if (d.Pclass === 2) {
middle++;
} else {
lower++;
}
});
return [{
category: "Lower",
count: lower
}, {
category: "Middle",
count: middle
}, {
category: "Upper",
count: upper
}];
}
/**
* Draw the survival chart
* - isRedraw flag to minimize opeartions in each redraw
*/
function drawSurvivalChart(survivalData, isRedraw) {
// Chart Properties
const margin = {
top: 0,
left: 50,
bottom: 32,
right: 35
},
width = 800,
height = 60;
// Main SVG group
/*console.log(survival.svg);*/
var svg = isRedraw ?
survivalChart.svg :
d3.select("div#survival")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
;
/*
chartSvgs.survivalChart.svg :
d3.select("div#survival")
.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 + ")",
class: 'main-group'
});
*/
svg.attr({
transform: "translate(" + margin.left + "," +
margin.top + ")",
class: 'main-group'
});
console.log(svg);
/*console.log(svg);*/
// Build the Scales
// xScale and yScale stays the same on purpose in every redraw
var xScale = isRedraw ? survivalChart.xScale : d3.scaleLinear()
.domain([0, d3.max(survivalData, function (d) {
return d.count;
})])
.range([0, width]);
var yScale = isRedraw ? survivalChart.yScale : d3.scaleBand()
.domain(survivalData.map(function (d) {
return d.category;
})).rangeRound([0, height]).padding([0.2])
;
// Bar Groups - one group per survival result
console.log(svg)
var barGroups = svg.selectAll("g.bar-group")
.data(survivalData, function (d) {
return d.category;
})
.enter()
.append("g")
.attr("class", function (d) {
return d.category.toLowerCase() + " bar-group";
});
barGroups.attr("transform", function (d) {
return "translate(" + 0 + "," + yScale(d.category) + ")";
});
// Draw the rect in every bar group
var barGroupsRect = isRedraw ? barGroups.select("rect.survival-data") :
barGroups
.append("rect")
.attr("class", "survival-data")
.attr("height", function (d) {
return yScale.bandwidth();
});
barGroupsRect
.attr("width", function (d) {
return xScale(d.count);
});
console.log(barGroupsRect);
// Draw the text to show the count
var barGroupsText = isRedraw ? barGroups.select("text.bar.text") :
barGroups.append('text')
.attr({
"class": "bar text",
'alignment-baseline': 'middle'
});
console.log(barGroupsText);
barGroupsText.text(function (d) {
return d.count;
})
.attr("transform", function (d) {
return "translate(" + (xScale(d.count) + 5) + ", " + (yScale.d3.scaleBand()
.rangeRound() / 2) + ")";
});
// Draw Axes
if (!isRedraw) {
// x axis
var xAxis = d3.axisLeft()
.orient('bottom')
.scale(xScale)
.ticks(20);
svg.append('g')
.attr({
transform: 'translate(0,' + height + ')'
})
.attr("class", "x axis")
.call(xAxis);
// y axis
var yAxis = d3.axisBottom()
.orient('left')
.scale(yScale);
svg.append('g')
.attr("class", "y axis")
.call(yAxis);
// x axis label
svg.append('g')
.attr({
class: "x axis-label",
transform: "translate(" + (width / 2 - 30) + ", " + (height + 30) + ")"
})
.append('text')
.text('Count');
}
// Store the object
survivalChart.svg = svg;
survivalChart.xScale = xScale;
survivalChart.yScale = yScale;
survivalChart.margin = margin;
survivalChart.height = height;
survivalChart.width = width;
}
/**
* Draw the survival percentage bar
*/
function drawSurvivalStack(survivalData, isRedraw) {
// Chart Properties
var margin = {
top: 8,
left: 20,
bottom: 8,
right: 2
},
axisPadding = 0,
width = 80,
barWidth = 20,
height = 70;
// Calculate total count
var totalCount = d3.sum(survivalData, function (d) {
return d.count;
});
if (totalCount <= 0) {
// It should not draw this graph if both counts are zero's.
return;
}
// Layered Data
const layer = d3.stack()(survivalData.map(function (d) {
return [{
x: d.category,
y: d.count
}];
}));
// Main SVG group
const svg = isRedraw ? survivalStack.svg : d3.select("div#survival-ratio")
.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 + ")",
class: 'main-group'
});
// Build the y scale
const yScale = isRedraw ? survivalStack.yScale : d3.scale.linear()
.range([0, height]);
yScale.domain([0, d3.max(layer, function (layer) {
return layer[0].y0 + layer[0].y;
})]);
// Bar Groups
const barGroups = svg.selectAll("g.bar-group")
.data(layer, function (d, i) {
return i;
});
barGroups.enter()
.append("g")
.attr("class", function (d) {
return d[0].x.toLowerCase() + " bar-group";
});
// Draw the Rects to each bar group
const barGroupRects =
barGroups
.selectAll("rect.survival-data")
.data(function (d) {
return d;
}, function (d) {
return d.x;
});
barGroupRects
.enter()
.append("rect")
.attr({
class: "survival-data",
x: 0,
width: barWidth
});
barGroupRects.attr("y", function (d, i) {
return yScale(d.y0);
})
.attr("height", function (d) {
return yScale(d.y);
});
// Draw the text to show the percentage
const barGroupTexts = barGroups
.selectAll("text.bar.text")
.data(function (d) {
return d;
}, function (d) {
return d.x;
});
if (!isRedraw) {
barGroupTexts
.enter()
.append('text')
.attr({
"class": "bar text",
'alignment-baseline': 'middle'
});
}
barGroupTexts.text(function (d) {
return Math.round(survivalData.find(function (sd) {
return sd.category === d.x;
}).count / totalCount * 1000) / 10 + "%";
})
.attr("transform", function (d) {
return "translate(" + (barWidth + 5) + ", " + (yScale(d.y0) + yScale(d.y) / 2) + ")";
});
// Store the object for later use
survivalStack.svg = svg;
survivalStack.xScale = null;
survivalStack.yScale = yScale;
survivalStack.margin = margin;
survivalStack.height = height;
survivalStack.width = width;
}
/**
* Draw the stacked age histogram
*/
function drawStackedAgeHistogram(data, isRedraw) {
// Chart Properties
var margin = {
top: 15,
left: 35,
bottom: 40,
right: 90
},
axisPadding = 0,
width = 1000,
barMargin = 1,
barWidth = 20,
height = 130;
// Prepare the data for the d3 stack function
var dataRows = [];
/* dataRows = data.filter(function (d) {
return d.Age !== null;
});*/
var survivalData = {};
survivalData.Survived = dataRows.filter(function (d) {
return d.Survived === 1;
});
survivalData.Perished = dataRows.filter(function (d) {
return d.Survived === 0;
});
var layeredData = [];
survivalLabels.forEach(function (group) {
layeredData.push({
name: group,
values: d3.range(maxAge + 1).map(function (age) {
return {
x: age,
y: d3.sum(survivalData[group], function (d) {
return d.Age >= age && d.Age < age + 1 ? 1 : 0;
})
};
})
});
});
// Build the stacked data
var stack = d3.stack();
var stackedData = stack(layeredData);
// Main SVG group
var svg = isRedraw ? stackedAgeHistogram.svg :
d3.select('div#stacked-age-chart')
.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 + ")",
class: 'main-group'
});
// Build the scales
var xScale = isRedraw ? stackedAgeHistogram.xScale : d3.scaleLinear()
.domain([0, stackedData[sdArray[0]]])
.range([0, width]);
var yScale = isRedraw ? stackedAgeHistogram.yScale : d3.scaleLinear()
.range([height, 0]);
yScale.domain([0, d3.max(stackedData[stackedData.length - 1].values, function (topStack) {
return topStack.y0 + topStack.y;
})]);
// Bar Group for each survival group
var barGroups = svg.selectAll("g.bar-group")
.data(stackedData, function (d) {
return d.name;
});
barGroups.enter()
.append("g")
.attr("class", function (d) {
return d.name.toLowerCase() + " bar-group";
});
// Draw rects in each bar groups
var barGroupRects =
barGroups
.selectAll("rect.survival-per-age")
.data(function (d) {
return d.values;
}, function (d) {
return d.x;
});
barGroupRects
.enter()
.append("rect")
.attr({
class: "survival-per-age",
width: xScale(1) - xScale(0) - barMargin * 2
});
barGroupRects.attr("x", function (d) {
return xScale(d.x) + barMargin;
})
.attr("y", function (d) {
return yScale(d.y0) - (height - yScale(d.y));
})
.attr("height", function (d) {
return height - yScale(d.y);
})
.classed("dimmed", function (d) {
// Dim the age group if it is filtered out
const ageRange = dataFilters.ageRange;
return !$.isEmptyObject(ageRange) &&
(d.x < ageRange[0] || d.x >= ageRange[1]);
});
// Draw the Axes
if (!isRedraw) {
// x-axis not needed to redraw everytime
var xAxis = d3.svg.axisLeft()
.orient("bottom")
.ticks(16)
.scale(xScale);
svg.append("g")
.attr({
class: "x axis",
transform: "translate(" + axisPadding + ", " + height + ")"
})
.call(xAxis);
// Axis labels
svg.append('g')
.attr({
class: "x axis-label",
transform: "translate(" + (width / 2 - 60) + ", " + (height + 30) + ")"
})
.append('text')
.text('Age (Class width = 1 year)');
svg.append("g")
.attr({
class: "y axis-label",
transform: "translate(-25, " + (height / 2 + 18) + ") rotate(-90)"
})
.append('text')
.text('Count');
}
// Draw the y axis. Need to redraw with the data change everytime
var yAxis = d3.svg.axisBottom()
.scale(yScale)
.orient("left");
var yAxisGroup = isRedraw ? svg.select("g.y.axis") :
svg.append("g")
.attr({
class: "y axis",
transform: "translate(" + (-axisPadding) + ", 0)"
});
yAxisGroup.call(yAxis);
// Draw the legend
if (!isRedraw) {
var legendWidth = 87, legendHeight = 45;
var legendMainGroup = svg.append('g')
.attr({
width: legendWidth,
height: legendHeight
})
.attr('transform', 'translate(' + (width + margin.right - legendWidth - 1) + ',' + (-margin.top + 1) + ')');
// Draw the outline border
legendMainGroup.append('rect').attr({
width: legendWidth,
height: legendHeight,
class: 'legend-box'
});
// Draw two labels
var legendGroups = legendMainGroup.selectAll('g')
.data(stackedData.map(function (d) {
return d.name;
}))
.enter()
.append('g')
.attr('transform', function (d, i) {
return 'translate(0, ' + (i * (legendHeight / 2 - 3)) + ')';
});
// A small rect to show color
legendGroups.append('rect')
.attr({
width: 12,
height: 12,
transform: 'translate(7, 7)'
})
.attr('class', function (d) {
return d.toLowerCase() + ' legend-color';
});
// Text to show label
legendGroups.append('text')
.attr({
transform: 'translate(24, 5)',
class: 'legend-text',
'alignment-baseline': 'before-edge'
})
.text(function (d) {
return d;
});
}
// Store the object for later use
stackedAgeHistogram.svg = svg;
stackedAgeHistogram.xScale = xScale;
stackedAgeHistogram.yScale = yScale;
stackedAgeHistogram.margin = margin;
stackedAgeHistogram.height = height;
stackedAgeHistogram.width = width;
}
/**
* Draw the stacked sex bar chart
*/
function drawStackedSexBarChart(data, isRedraw) {
// Chart properties
var margin = {
top: 5,
left: 50,
bottom: 30,
right: 30
},
width = 450,
barHeight = 20,
height = 40;
// Prepare the data for d3 stack function
var survivalData = {};
survivalData.Survived = data.filter(function (d) {
return d.Survived === 1;
});
survivalData.Perished = data.filter(function (d) {
return d.Survived === 0;
});
var layeredData = [];
survivalLabels.forEach(function (group) {
layeredData.push({
name: group,
values: sexLabels.map(function (sexLabel) {
return {
x: sexLabel,
y: d3.sum(survivalData[group], function (d) {
return d.Sex === sexLabel.toLowerCase() ? 1 : 0;
})
};
})
});
});
// Stack the data
var stack = d3.stack().values(function (d) {
return d.values;
});
var stackedData = stack(layeredData);
console.log("stackedData " + stackedData);
console.log("layeredData " + layeredData);
// Main SVG Group
var svg = isRedraw ? stackedSexBarChart.svg :
d3.select('div#stacked-sex-chart')
.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 + ")",
class: 'main-group'
});
// Build the scales
// x scale will change based on data change
var xScale = isRedraw ? stackedSexBarChart.xScale : d3.scale.linear()
.range([0, width]);
xScale.domain([0, d3.max(stackedData[stackedData.length - 1].values, function (topStack) {
return topStack.y0 + topStack.y;
})]);
// y scale will not change in every redraw
var yScale = isRedraw ? stackedSexBarChart.yScale : d3.scaleOrdinal()
.domain(stackedData[0].values.map(function (d) {
return d.x;
}))
.rangeRound([0, height]).padding(0.2);
// Bar Groups for each survival data
var barGroups = svg.selectAll("g.bar-group")
.data(stackedData, function (d) {
return d.name;
});
barGroups.enter()
.append("g")
.attr("class", function (d) {
return d.name.toLowerCase() + " bar-group";
});
// Draw rects for each Bar Group
var barGroupRects =
barGroups
.selectAll("rect.survival-per-sex")
.data(function (d) {
return d.values;
}, function (d) {
return d.x;
});
barGroupRects
.enter()
.append("rect")
.attr({
class: "survival-per-sex clickable",
height: yScale.rangeBand()
});
barGroupRects
.attr("x", function (d) {
return xScale(d.y0);
})
.attr("width", function (d) {
return xScale(d.y);
})
.attr("y", function (d) {
return yScale(d.x);
})
.classed("dimmed", function (d) {
// Dim the group if it is filtered out
const selectedSex = dataFilters.sex;
return !$.isEmptyObject(selectedSex) &&
(selectedSex.indexOf(d.x.toLowerCase()) < 0);
})
.on('click', function (d) {
// click event to filter the data
if (isSexBarsClickable) {
const sex = d.x.toLowerCase();
if ($.isEmptyObject(dataFilters.sex)) {
dataFilters.sex.push(sex);
} else if (dataFilters.sex.indexOf(sex) >= 0 && dataFilters.sex.length > 1) {
dataFilters.sex.splice(dataFilters.sex.indexOf(sex), 1);
} else {
dataFilters.sex = [];
}
redrawWithDataFilters();
}
});
// Draw Axes
var xAxis = d3.svg.axisLeft()
.orient("bottom")
.scale(xScale);
var xAxisGroup = isRedraw ? svg.select("g.x.axis") :
svg.append("g")
.attr({
class: "x axis",
transform: "translate(0, " + height + ")"
});
xAxisGroup.call(xAxis);
if (!isRedraw) {
// y axis needs to be drawn only once
var yAxis = d3.svg.axisBottom()
.scale(yScale)
.orient("left");
svg.append("g")
.attr({
class: "y axis"
})
.call(yAxis);
// x axis label
svg.append('g')
.attr({
class: "x axis-label",
transform: "translate(" + (width / 2 - 30) + ", " + (height + 30) + ")"
})
.append('text')
.text('Count');
}
// Store the object for later use
stackedSexBarChart.svg = svg;
stackedSexBarChart.xScale = xScale;
stackedSexBarChart.yScale = yScale;
stackedSexBarChart.margin = margin;
stackedSexBarChart.height = height;
stackedSexBarChart.width = width;
}
/**
* Draw the stacked passenger class bar chart
*/
function drawStackedPclassBarChart(data, isRedraw) {
// chart properties
var margin = {
top: 5,
left: 50,
bottom: 30,
right: 30
},
width = 450,
barHeight = 20,
height = 60;
// Prepare the data for the d3 stack function
var survivalData = {};
survivalData.Survived = data.filter(function (d) {
return d.Survived === 1;
});
survivalData.Perished = data.filter(function (d) {
return d.Survived === 0;
});
const layeredData = [];
survivalLabels.forEach(function (group) {
layeredData.push({
name: group,
values: Object.keys(pclassMap).map(function (pclass) {
return {
x: pclassMap[+pclass],
y: d3.sum(survivalData[group], function (d) {
return d.Pclass === +pclass ? 1 : 0;
})
};
})
});
});
// Stack the data
var stack = d3.stack().values(function (d) {
return d.values;
});
var stackedData = stack(layeredData);
// Main SVG group
const svg = isRedraw ? stackedPclassBarChart.svg :
d3.select('div#stacked-pclass-chart')
.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 + ")",
class: 'main-group'
});
// Draw the scales
// x scale will change with the data change
var xScale = isRedraw ? stackedPclassBarChart.xScale : d3.scale.linear()
.range([0, width]);
xScale.domain([0, d3.max(stackedData[stackedData.length - 1].values, function (topStack) {
return topStack.y0 + topStack.y;
})]);
// y scale needs to be built only once
var yScale = isRedraw ? stackedPclassBarChart.yScale : d3.scale.ordinal()
.domain(stackedData[0].values.map(function (d) {
return d.x;
}))
.rangeRoundBands([0, height], 0.2);
// Bar Group for each survival group
var barGroups = svg.selectAll("g.bar-group")
.data(stackedData, function (d) {
return d.name;
});
barGroups.enter()
.append("g")
.attr("class", function (d) {
return d.name.toLowerCase() + " bar-group";
});
// Draw rects for each bar group
var barGroupRects =
barGroups
.selectAll("rect.survival-per-pclass")
.data(function (d) {
return d.values;
}, function (d) {
return d.x;
});
barGroupRects
.enter()
.append("rect")
.attr({
class: "survival-per-pclass clickable",
height: yScale.rangeBand()
});
barGroupRects
.attr("x", function (d) {
return xScale(d.y0);
})
.attr("width", function (d) {
return xScale(d.y);
})
.attr("y", function (d) {
return yScale(d.x);
})
.classed("dimmed", function (d) {
// Dim the rect when the clsss is filtered out
const selectedPclasses = dataFilters.pclass;
return !$.isEmptyObject(selectedPclasses) &&
(selectedPclasses.indexOf(+($.grep(Object.keys(pclassMap), function (k) {
return pclassMap[k] === d.x;
})[0])) < 0);
})
.on("click", function (d) {
// click event to filter the data
if (isPclassBarsClickable) {
const pclassId = +($.grep(Object.keys(pclassMap), function (k) {
return pclassMap[k] === d.x;
})[0]);
if ($.isEmptyObject(dataFilters.pclass) ||
(dataFilters.pclass.indexOf(pclassId) < 0 && dataFilters.pclass.length < 2)) {
dataFilters.pclass.push(pclassId);
} else if (dataFilters.pclass.indexOf(pclassId) >= 0 && dataFilters.pclass.length > 1) {