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// ******************************************
// Trend line for reporting
// based on scenario_history.txt
// where data looks like
// date,scenario,installer,detail,score
// 2016-09-22 13:12,os-nosdn-fdio-noha,apex,4/12,33.0
// 2016-09-22 13:13,os-odl_l2-fdio-noha,apex,12/15,80.0
// 2016-09-22 13:13,os-odl_l2-sfc-noha,apex,18/24,75.0
// .....
// ******************************************
// Set the dimensions of the canvas / graph
var trend_margin = {top: 20, right: 30, bottom: 50, left: 40},
trend_width = 300 - trend_margin.left - trend_margin.right,
trend_height = 130 - trend_margin.top - trend_margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%Y-%m-%d %H:%M").parse;
// Set the ranges
var trend_x = d3.time.scale().range([0, trend_width]);
var trend_y = d3.scale.linear().range([trend_height, 0]);
// Define the axes
var trend_xAxis = d3.svg.axis().scale(trend_x)
.orient("bottom").ticks(2).tickFormat(d3.time.format("%m-%d"));
var trend_yAxis = d3.svg.axis().scale(trend_y)
.orient("left").ticks(2);
// Define the line
var valueline = d3.svg.line()
.x(function(d) { return trend_x(d.date); })
.y(function(d) { return trend_y(d.score); });
var trend = function(container, trend_data) {
var trend_svg = d3.select(container)
.append("svg")
.attr("width", trend_width + trend_margin.left + trend_margin.right)
.attr("height", trend_height + trend_margin.top + trend_margin.bottom)
.append("g")
.attr("transform",
"translate(" + trend_margin.left + "," + trend_margin.top + ")");
// Scale the range of the data
trend_x.domain(d3.extent(trend_data, function(d) { return d.date; }));
trend_y.domain([0, d3.max(trend_data, function(d) { return d.score; })]);
// Add the X Axis
trend_svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + trend_height + ")")
.call(trend_xAxis);
// Add the Y Axis
trend_svg.append("g")
.attr("class", "y axis")
.call(trend_yAxis);
// Add the valueline path.
trend_svg.append("path")
.attr("class", "line")
.attr("d", valueline(trend_data))
.attr("stroke", "steelblue")
.attr("fill", "none");
trend_svg.selectAll(".dot")
.data(trend_data)
.enter().append("circle")
.attr("r", 2.5)
.attr("cx", function(d) { return trend_x(d.date); })
.attr("cy", function(d) { return trend_y(d.score); });
return trend;
}
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