Basic line Chart

Basic line chart

Link

bl.ocks.org/Eleonore9/c1648f9e143ae451a2dd6f044334c31f

Content

This simple bar chart forked from mbostock's block: Line Chart

Changes from the original chart

Aim: I'm hoping to create a reusable template for my data viz needs

Idea: I'm expecting data as CSV file and I'm reusing most of mbostock's original project.

How to use as a template?

Note: The template is still being tested and updated to make it more generic

Fork the project
Upload your CSV file
In index.html, update the top section:

// *** EDIT TO CUSTOMISE ***
var dataFile = "test-data.csv",
		xName = "year", // column name for x-axis in the csv
		xAxisLabel = "Years",
    xLabelxPosition = 0, xLabelyPosition = 40,
    yName = "value", // column name for y-axis in the csv
    yAxisLabel = "Value"
		yLabelxPosition = -5, yLabelyPosition = -17;

function transformXdata(data) {
  var parseTime = d3.timeParse("%Y");
  return parseTime(data);
}
function transformYdata(data) {
  return +data; // '+' converts to numbers
}
// **************************

<!DOCTYPE html>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
// *** EDIT TO CUSTOMISE ***
var dataFile = "test-data.csv",
		xName = "year", // column name for x-axis in the csv
		xAxisLabel = "Years",
    xLabelxPosition = 0, xLabelyPosition = 40,
    yName = "value", // column name for y-axis in the csv
    yAxisLabel = "Value"
		yLabelxPosition = -5, yLabelyPosition = -17,
    lineColor = "#729fcf";

var x = d3.scaleTime()
    .rangeRound([0, width]);

var y = d3.scaleLinear()
    .rangeRound([height, 0]);

d3.csv(dataFile, function(d) {
  return {xData:  transformXdata(d[xName]),
  				yData:  transformYdata(d[yName])};
}, function(error, data) {
  if (error) throw error;

// Define the span of x and y axis
  var maxY= d3.max(data, function(d) { return d.yData; });
  x.domain(d3.extent(data, function(d) { return d.xData; }));
  y.domain([0, maxY]);
  
  var line = d3.line()
    .x(function(d) { return x(d.xData); })
    .y(function(d) { return y(d.yData); });

g.append("g")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(x))
		.append("text") // Add x-axis label
  		.attr("fill", "#000")
  		.attr("x", (width / 2) + xLabelxPosition)
  		.attr("y", xLabelyPosition)
  		.style("font-size", "14px")
  		.text(xAxisLabel);

g.append("g")
      .call(d3.axisLeft(y))
    .append("text") // Add y-axis label
      .attr("fill", "#000")
  		.attr("x", yLabelxPosition)
      .attr("y", yLabelyPosition)
  		.style("font-size", "14px")
      .text(yAxisLabel);

g.append("path")
      .datum(data)
      .attr("fill", "none")
      .attr("stroke", lineColor)
      .attr("stroke-linejoin", "round")
      .attr("stroke-linecap", "round")
      .attr("stroke-width", 2.5)
      .attr("d", line);
});

</script>

https://d3js.org/d3.v4.min.js