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