Fuzzy scorematrix toarray

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ScoreMatrix.ToArray

The whole matrix, row-major.

public double[] ToArray()

Returns — a copy of every score, cell [row, column] at row * Columns + column.

Example — the flat layout, and where a cell sits in it.

using Lodestar.Fuzzy;

string[] queries = ["new york", "boston"];
string[] choices = ["new york mets", "boston red sox", "atlanta braves"];

ScoreMatrix scores = Process.Cdist(queries, choices);
double[] flat = scores.ToArray();

int cells = flat.Length;                                          // => 6
double atOneOne = Math.Round(flat[(1 * scores.Columns) + 1], 4);  // => 60

Remarks — a copy, on purpose. The matrix is immutable and hands out no reference to its own storage; a caller who wants to read without copying takes Row, which is a span over it.

Row-major is the layout every bulk member in this repository takes — Lodestar.Preprocessing's transformers, Lodestar.Cluster's fits — so this array goes straight into one of them without a transpose.

Applies to — net10.0, netstandard2.0.

See also — ScoreMatrix, ScoreMatrix.Row.