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);
}