Normalised histogram in Observable Plot

Community Help
4

The following reducer should accomplish what you want:

Plot.binX({
  y: (a, bin) => {
    return a.length / pts.length / (bin.x2 - bin.x1);
  }
}

Here it is in action:

Note that the data consists of 5000 points generated by d3.randomNormal() and the curve is a graph of the standard normal, illustrating that the technique works.