internal static double Dot(DoubleArrayVector x, SparseBoolVector y) { double sum = 0; int xlen = x.Length; int ylen = y.indices.Length; int i = 0; int j = 0; while (i < xlen && j < ylen) { if (i == y.indices[j]) { j++; sum += x.values[i++]; } else { if (i > y.indices[j]) { ++j; } else { ++i; } } } return(sum); }
internal static double Dot(FloatArrayVector x, DoubleArrayVector y) { double sum = 0; for (int i = 0; i < x.Length; i++) { sum += x.values[i] * y.values[i]; } return(sum); }
internal static double SumSquaredDiffs(FloatArrayVector x, DoubleArrayVector y) { double sum = 0; for (int i = 0; i < x.Length; i++) { double d = x.values[i] - y.values[i]; sum += d * d; } return(sum); }
internal static double Dot(BoolArrayVector x, DoubleArrayVector y) { double sum = 0; for (int i = 0; i < x.Length; i++) { if (x.values[i]) { sum += y.values[i]; } } return(sum); }
internal static double SumSquaredDiffs(BoolArrayVector x, DoubleArrayVector y) { double sum = 0; for (int i = 0; i < x.Length; i++) { double d = y.values[i]; if (x.values[i]) { d -= 1; } sum += d * d; } return(sum); }
internal static double SumSquaredDiffs(DoubleArrayVector x, SparseBoolVector y) { double sum = 0; int xlen = x.Length; int ylen = y.indices.Length; int i = 0; int j = 0; while (i < xlen && j < ylen) { if (i == y.indices[j]) { double d = x.values[i++] - 1; j++; sum += d * d; } else if (i > y.indices[j]) { sum += 1; ++j; } else { sum += x.values[i] * x.values[i]; ++i; } } while (i < xlen) { sum += x.values[i] * x.values[i]; ++i; } while (j < ylen) { sum += 1; ++j; } return(sum); }