Data Visualization with D3 - Array described as 3d has only 2 dimensions

Describe your problem and how to reproduce it:

I’d like to submit a suggestion for a clarification in the explanation used in the following lesson:

Data Visualization with D3: Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset

The instructions in this lesson refer to variable positionData which is defined as:

const positionData = [[1, 7, -4],[6, 3, 8],[2, 9, 3]]

The lesson describes this as being a 3d array:

The positionData variable holds a 3-dimensional (3D) array.

This is misleading as positionData is not a 3-dimensional array but a 2d array. A 3d array could not be mapped to a 2d representation like a table:

1	7	-4
6	3	8
2	9	3

A 3d array would have a structure like:

[
    [
        ["foo", "bar"],
        ["fizz, "buzz]
    ],
    [
        ["foo", "bar"],
        ["fizz, "buzz]
    ]
]

I think this should be considered for rewording less it lead to a misunderstanding.

Add a Link to the page with the problem: https://www.freecodecamp.org/learn/data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset

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[AshNaz87]

I’d like to take this issue

[moT01]

How about this…

The positionData array holds sub arrays of x, y, and z coordinates. Use a D3 
method to find the maximum value of the z coordinate (the third value) from 
the arrays and save it in the output variable.

I would also get rid of the Note and Fun fact sentence.