How to use csv data in d3.js?

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by daisha , in category: Javascript , 2 months ago

How to use csv data in d3.js?

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1 answer

by raphael_tillman , 2 months ago

@daisha 

To use CSV data in D3.js, you can follow these steps:

  1. Load the D3 library in your HTML file:
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<script src="https://d3js.org/d3.v7.min.js"></script>


  1. Use the d3.csv() method to load the CSV data file and process it:
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d3.csv("data.csv")
  .then(function(data) {
    // Process the CSV data here
    console.log(data);
  })
  .catch(function(error) {
    console.log(error);
  });


  1. Inside the then() method, you can access the CSV data and use it to create visualizations in D3.js. For example, you can create a simple bar chart using the loaded data:
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d3.csv("data.csv")
  .then(function(data) {
    d3.select("svg")
      .selectAll("rect")
      .data(data)
      .enter()
      .append("rect")
      .attr("x", function(d, i) { return i * 30; })
      .attr("y", function(d) { return 100 - d.value * 2; })
      .attr("width", 25)
      .attr("height", function(d) { return d.value * 2; })
      .attr("fill", "steelblue");
  })
  .catch(function(error) {
    console.log(error);
  });


This code snippet creates a simple bar chart using the CSV data loaded using the d3.csv() method. You can further customize and enhance the visualization based on your specific requirements.