Discover the highest value within a JSON object and save it as a variable

I am working on a d3 graph with a specified Y-axis range in my code:

var yScale = d3.scaleLinear()
    .domain([0, 1]) // input 
    .range([height, 0]); // output 

However, I have realized that a scale of 0 to 1 may not be the most suitable for my data. As a beginner in this, I attempted to calculate the maximum value in my dataset like this:

// Data
var dataset = [{
      y: 0.1
    },
    {
      y: 0.6
    },
    {
      y: 0.6
    },
    {
      y: 0.7
    }
  ];

var mymax = Math.max(dataset);

My intention was to then use this maximum value to adjust my .domain range like so:

.domain([0, mymax]) // input 

Unfortunately, my approach seems to be incorrect as I am getting NaN as a result. I suspect the issue might be related to how I am referencing the data values as 'y' instead of actual numbers.

This post is not meant to be a duplicate question.

Answer №1

const maximumValue = Math.max.apply(Math, data.map(function(item) { return item.value; }));

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