public async Task <(double[, ] similarityMatrix, int[] ids)> FindSimilarities()
{
var context = new Database.DatabaseContext(_dbContextOptions);
var movies = await context.Movies
.Include(m => m.Tags)
.Include(m => m.Creators)
.ToListAsync();
var movieVectorizer = new MovieVectorizer(Tags, context.Creators);
var weights = new MovieVectorizer.Weights
{
Year = 3.0f,
Tags = 2.0f,
Rating = 1.0f,
Descriptions = 5.0f,
Creators = 2.0f
};
var vectorizedMovies = await movieVectorizer.Vectorize(movies, weights);
var stringifiedMatrix = Matrix.MatrixToString(vectorizedMovies);
var similarityMatrix = await PythonMethods.FindSimilarities(stringifiedMatrix);
var ids = movies.Select(m => m.Id).ToArray();
return(similarityMatrix, ids);
}
public async Task <double[, ]> VectorizeDescriptions(IEnumerable <string> descriptions, float weight = 1.0f)
{
var vectorizedDescriptions = await PythonMethods.VectorizeDocumentsTFIDF(descriptions);
return(FilterVectorizedDescriptions(vectorizedDescriptions, weight, 20));
}