Created
October 18, 2018 20:22
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| config const filename = "../data/input.txt"; | |
| config const out_filename = "out.txt"; | |
| config const iterations = 1; | |
| config const k = 2; | |
| var f = open(filename, iomode.r); | |
| var reader = f.reader(); | |
| const rows = reader.read(int); | |
| const cols = reader.read(int); | |
| type point = [0..#cols] real; | |
| const pDomain = 0..#rows; | |
| const clustersDomain = 0..#k; | |
| var data: [pDomain] point; | |
| reader.read(data); | |
| f.close(); | |
| reader.close(); | |
| record Cluster { | |
| var n_items: int; | |
| var centroid: point; | |
| var centroidMean: point; | |
| proc init() { | |
| n_items = 0; | |
| centroid = 0.0; | |
| } | |
| proc init(row: point) { | |
| n_items = 1; | |
| centroid = row; | |
| } | |
| proc addRow(row: point) { | |
| n_items += 1; | |
| centroid += row; | |
| } | |
| proc addCluster(otherCluster: Cluster) { | |
| n_items += otherCluster.n_items; | |
| centroid += otherCluster.centroid; | |
| } | |
| proc dist(row: point) { | |
| return sqrt(+ reduce ((centroidMean - row) ** 2)); | |
| } | |
| proc reset() { | |
| n_items = 0; | |
| centroid = 0.0; | |
| } | |
| proc mean() { | |
| centroidMean = centroid / n_items; | |
| return centroidMean; | |
| } | |
| } | |
| var clusters: [clustersDomain] Cluster; | |
| var labels: [pDomain] int; | |
| for i in pDomain { | |
| labels[i] = i % k; | |
| clusters[labels[i]].addRow(data[i]); | |
| } | |
| [cluster in clusters] cluster.mean(); | |
| [cluster in clusters] writeln(cluster); | |
| [cluster in clusters] cluster.reset(); | |
| forall i in pDomain { | |
| var row = data[i]; | |
| var dists = [cluster in clusters] cluster.dist(row); | |
| var (_, min_index) = minloc reduce zip(dists, dists.domain); | |
| clusters[min_index].addRow(row); | |
| } | |
| [cluster in clusters] cluster.mean(); | |
| [cluster in clusters] writeln(cluster); |
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