Figure 2
From: A simple and effective approach to quantitatively characterize structural complexity

Principle of the structural unit (left) and the uniform angle index with k = 4 nearest neighbours and k + 1 = 5 possible discrete outcomes.
From: A simple and effective approach to quantitatively characterize structural complexity

Principle of the structural unit (left) and the uniform angle index with k = 4 nearest neighbours and k + 1 = 5 possible discrete outcomes.