[mlpack-git] [mlpack/mlpack] Universal B tree implementation (#746)
Ryan Curtin
notifications at github.com
Wed Aug 17 20:49:41 EDT 2016
> + ElemType lower, higher;
> +
> + for (size_t i = 0; i < numBounds; i++)
> + {
> + ElemType sum = 0;
> +
> + for (size_t d = 0; d < dim; d++)
> + {
> + lower = loBound(d, i) - point[d];
> + higher = point[d] - hiBound(d, i);
> +
> + // Since only one of 'lower' or 'higher' is negative, if we add each's
> + // absolute value to itself and then sum those two, our result is the
> + // nonnegative half of the equation times two; then we raise to power Power.
> + sum += pow((lower + fabs(lower)) + (higher + fabs(higher)),
> + (ElemType) MetricType::Power);
You can save a little bit of computation here if you terminate early:
```
if (sum >= minSum)
continue;
```
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