public CacheEntry(Key key, QrFactorization qrFactorization)
{
Key = key;
QrFactorization = qrFactorization;
MatrixCrossproduct = ImmutableMatrix.OfMatrix(ComputeMatrixCrossproduct(key.Matrix, qrFactorization.IndependentColumnIndexes));
MatrixCrossproductInverse = ImmutableMatrix.OfMatrix(MatrixCrossproduct.Inverse());
}
public CacheEntry GetQrFactorization(Matrix <double> matrix, double tolerance)
{
var key = new Key(matrix, tolerance);
CacheEntry cacheEntry;
lock (_dictionary)
{
if (_dictionary.TryGetValue(key, out cacheEntry))
{
return(cacheEntry);
}
}
var qrFactorization = QrFactorization.GetQrFactorization(matrix, tolerance);
lock (_dictionary)
{
_dictionary[key] = cacheEntry = new CacheEntry(key, qrFactorization);
}
return(cacheEntry);
}