How to change d3.csv to d3.json?

@darrion.kuhn 

To change a d3.csv request to a d3.json request, you need to modify the code to load a JSON file instead of a CSV file. Here is an example of how you can do this:

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// Load JSON file using d3.json
d3.json("data.json").then(function(data) {
    // Use the loaded JSON data
    console.log(data);
}).catch(function(error) {
  // Handle any errors
  console.error(error);
});

In this example, we are using the d3.json() function to fetch a JSON file named "data.json" and then we are logging the loaded JSON data to the console. Make sure to replace "data.json" with the path to your JSON file.

Remember to also update any code that processes the data to work with JSON instead of CSV format, as the structure of the data may differ between the two formats.