Serach whether numbers of different arrays are close to each other

I have 8 arrays of numbers. I want to know whether the numbers of these 8 arrays are close to each other. So for instance

Array1: 1 100 250 400

Array2: 30 89 170 800

Array3: 20 51 870

I want to know whether the numbers meet the condition of being closer than 50 to each other. How do I do this?

[Jan]

What is the wanted output for these 3 inputs? You mention 8 arrays. What exactly does "closer than 50 to each other" mean e.g. for the 3 values: [10, 69, 118]? Are they or aren't they closer than 50? Then what about [10, 69, 118, 167]?

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Answer 1

[Adam Danz]

A = [20 51 870];            % Input vector
w = 50;                     % Distances less than this are considered "close"
dA = abs(diff(A))< w;       % Identify which values are "close"
any(dA)                     % TRUE if any of the distances are less than 50
all(dA)                     % TRUE if all of the distances are less than 50