[Test()] public void TestRowDifference()
{
var matrix1 = new Matrix <float>(5, 5);
float[] row = { 1, 2, 3, 4, 5 };
for (int i = 0; i < 5; i++)
{
matrix1.SetRow(i, row);
}
var matrix2 = new Matrix <float>(5, 5);
for (int i = 0; i < 5; i++)
{
matrix2.SetRow(i, row);
}
var result = MatrixExtensions.RowDifference(matrix1, 2, matrix2, 3);
for (int i = 0; i < 5; i++)
{
Assert.AreEqual(0, result[0]);
}
}
private float GetItemSimilarity(int itemBought, int newItem)
{
IList <float> rowDiff = MatrixExtensions.RowDifference(item_factors, itemBought, item_factors, newItem);
return((float)rowDiff.EuclideanNorm());
}
private float GetUserSimilarity(int user, int newUser)
{
IList <float> rowDiff = MatrixExtensions.RowDifference(user_factors, user, user_factors, newUser);
return((float)rowDiff.EuclideanNorm());
}