295 lines
9.9 KiB
JavaScript
295 lines
9.9 KiB
JavaScript
$(document).on('turbolinks:load', function() {
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// /38/statistics good for testing
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if ($.isController('exercises') && $('.working-time-graphs').isPresent()) {
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var working_times = $('#data').data('working-time');
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function get_minutes (timestamp){
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try{
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hours = timestamp.split(":")[0];
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minutes = timestamp.split(":")[1];
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seconds = timestamp.split(":")[2];
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return parseFloat(hours * 60) + parseInt(minutes);
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} catch (err){
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return 0;
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}
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}
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// GET ALL THE DATA ------------------------------------------------------------------------------
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minutes_array = _.map(working_times, function(item){return get_minutes(item)});
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minutes_array_length = minutes_array.length;
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if (minutes_array_length === 0){
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return;
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}
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maximum_minutes = _.max(minutes_array) + 1; // We need to respect the last minute as well
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const minutes_count = new Array(maximum_minutes).fill(0);
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for (var i = 0; i < minutes_array_length; i++){
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var studentTime = minutes_array[i];
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for (var j = 0; j < studentTime; j++){
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minutes_count[j] += 1;
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}
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}
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function getWidth() {
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if (self.innerWidth) {
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return self.innerWidth;
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}
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if (document.documentElement && document.documentElement.clientWidth) {
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return document.documentElement.clientWidth;
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}
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if (document.body) {
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return document.body.clientWidth;
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}
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}
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// DRAW THE LINE GRAPH ------------------------------------------------------------------------------
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function drawLineGraph() {
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var width_ratio = .8;
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if (getWidth() * width_ratio > 1000){
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width_ratio = 1000 / getWidth();
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}
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var height_ratio = .7;
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var margin = {top: 100, right: 20, bottom: 70, left: 70},//30,50
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width = (getWidth() * width_ratio) - margin.left - margin.right,
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height = (width * height_ratio) - margin.top - margin.bottom;
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//var formatDate = d3.time.format("%M");
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var x = d3.scaleLinear()
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.range([0, width]);
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var y = d3.scaleLinear()
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.range([height, 0]); // - (height/20
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var xAxis = d3.axisBottom(x).ticks(20);
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var yAxis = d3.axisLeft(y)
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.ticks(20)
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.tickSizeInner(-width)
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.tickSizeOuter(0);
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var line = d3.line()
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.x(function (d, i) {
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return x(i);
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})
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.y(function (d) {
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return y(d / minutes_count[0] * 100);
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});
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var svg = d3.select("#chart_1").append("svg") //PLACEMENT GOES HERE <---------------
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.attr("width", width + margin.left + margin.right)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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x.domain(d3.extent(minutes_count, function (d, i) {
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return (i);
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}));
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y.domain(d3.extent(minutes_count, function (d) {
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return (d / minutes_count[0] * 100);
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}));
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svg.append("g") //x axis
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.attr("class", "x axis")
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.attr("transform", "translate(0," + height + ")")
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.call(xAxis);
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svg.append("text")// x axis label
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.attr("class", "x axis")
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.attr("text-anchor", "middle")
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.attr("x", width / 2)
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.attr("y", height)
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.attr("dy", ((height / 20) + 20) + 'px')
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.text("Time Spent on Assignment (Minutes)")
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.style('font-size', 14);
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svg.append("g") // y axis
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.attr("class", "y axis")
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.call(yAxis);
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svg.append("text") // y axis label
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.attr("transform", "rotate(-90)")
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.attr("x", -height / 2)
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.attr("dy", "-3em")
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.style("text-anchor", "middle")
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.text("Students (%)")
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.style('font-size', 14);
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svg.append("text")// Title
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.attr("class", "x axis")
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.attr("text-anchor", "middle")
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.attr("x", (width / 2))//+300)
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.attr("y", 0)
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.attr("dy", '-1.5em')
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.text("Time Spent by Students on Exercise")
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.style('font-size', 20)
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.style('text-decoration', 'underline');
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svg.append("path")
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.datum(minutes_count)
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.attr("class", "line")
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.attr('id', 'myPath')
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.attr("stroke", "orange")
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.attr("stroke-width", 5)
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.attr("fill", "none")
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.attr("d", line);
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}
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drawLineGraph();
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// DRAW THE SECOND GRAPH ------------------------------------------------------------------------------
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function drawBarGraph() {
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var groupWidth = 5;
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var groupRanges = 0;
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var workingTimeGroups = [];
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do {
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var clusterCount = 0;
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for (var i = 0; i < minutes_array.length; i++) {
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if ((minutes_array[i] >= groupRanges) && (minutes_array[i] < (groupRanges + groupWidth))) {
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clusterCount++;
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}
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}
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workingTimeGroups.push(clusterCount);
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groupRanges += groupWidth;
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}
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while (groupRanges < maximum_minutes);
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var clusterCount = 0,
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sum = 0,
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maxVal = 0;
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for (var i = 0; i < minutes_array.length; i++) {
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if (minutes_array[i] > maximum_minutes) {
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currentValue = minutes_array[i];
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sum += currentValue;
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if (currentValue > maxVal) {
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maxVal = currentValue;
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}
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clusterCount++;
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}
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}
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// ToDo: Take care of x axis description if this is added
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// workingTimeGroups.push(clusterCount);
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var maxStudentsInGroup = Math.max.apply(Math, workingTimeGroups);
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var width_ratio = .8;
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// Scale width to fit into bootsrap container
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if (getWidth() * width_ratio > 1000){
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width_ratio = 1000 / getWidth();
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}
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var height_ratio = .7;
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var margin = {top: 100, right: 20, bottom: 70, left: 70},
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width = (getWidth() * width_ratio) - margin.left - margin.right,
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height = (width * height_ratio) - margin.top - margin.bottom;
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var x = d3.scaleBand()
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.rangeRound([0, width])
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.paddingInner(0.1)
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.domain(workingTimeGroups.map(function (d, i) {
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return i * groupWidth;
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}));
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var xAxis = d3.axisBottom(x)
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.ticks(10)
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.tickValues(x.domain().filter(function(d, i){
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return (d % 10) === 0
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}))
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.tickFormat(function(d) { return d + "-" + (d + groupWidth) });
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var y = d3.scaleLinear()
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.domain([0, maxStudentsInGroup])
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.range([height, 0]);
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var yAxis = d3.axisLeft(y)
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.ticks(10);
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var tip = d3.tip()
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.attr('class', 'd3-tip')
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.offset([-10, 0])
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.html(function(_event, d) {
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return "<strong>Students: </strong><span style='color:orange'>" + d + "</span>";
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});
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var svg = d3.select("#chart_2").append("svg")
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.attr("width", width + margin.left + margin.right)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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svg.call(tip);
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svg.append("g")
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.attr("class", "x axis")
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.attr("transform", "translate(0," + height + ")")
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.call(xAxis)
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.selectAll("text")
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.style("text-anchor", "end")
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.attr("dx", "-.8em")
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.attr("dy", ".15em")
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.attr("transform", function(d) {
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return "rotate(-45)"
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});
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svg.append("g")
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.attr("class", "y axis")
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.call(yAxis)
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.append("text")
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.attr("transform", "rotate(-90)")
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.attr("y", 6)
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.attr("dy", ".71em");
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svg.append("text")
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.attr("transform", "rotate(-90)")
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.attr("x", -height / 2)
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.attr("dy", "-3em")
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.style("text-anchor", "middle")
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.text("Students")
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.style('font-size', 14);
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svg.append("text")
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.attr("class", "x axis")
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.attr("text-anchor", "middle")
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.attr("x", width / 2)
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.attr("y", height)
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.attr("dy", ((height / 20) + 40) + 'px')
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.text("Working Time (Minutes)")
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.style('font-size', 14);
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svg.selectAll(".bar")
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.data(workingTimeGroups)
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.enter().append("rect")
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.attr("class", "bar")
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.attr("x", function(d, i) {
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return x(i * groupWidth);
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})
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.attr("width", x.bandwidth())
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.attr("y", function(d) { return y(d); })
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.attr("height", function(d) { return height - y(d); })
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.on('mouseenter', tip.show)
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.on('mouseout', tip.hide);
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svg.append("text")
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.attr("class", "x axis")
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.attr("text-anchor", "middle")
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.attr("x", (width / 2))
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.attr("y", 0)
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.attr("dy", '-1.5em')
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.text("Distribution of Time Spent by Students")
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.style('font-size', 20)
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.style('text-decoration', 'underline');
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}
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drawBarGraph();
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}
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});
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