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I’m looking for a decent implementation of the OPTICS algorithm in Python. I will use it to form density-based clusters of points ((x,y) pairs).

I'm looking for something that takes in (x,y) pairs and outputs a list of clusters, where each cluster in the list contains a list of (x, y) pairs belonging to that cluster.

1 Answer

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Ordering points to identify the clustering structure (OPTICS) is an algorithm for finding density-based clusters in spatial data. 

image

For example:

def cluster(order, distance, points, threshold):

    clusters = [[]]

    points   = sorted(zip(order, distance, points))

    splits   = ((v > threshold, p) for i,v,p in points)

    for iscluster, point in splits: 

        if iscluster: clusters[-1].append(point)

        elif len(clusters[-1]) > 0: clusters.append([])

    return clusters

    rd, cd, order = optics(points, 4)

    print cluster(order, rd, points, 38.0)

Hope this answer helps.

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