/// <summary>
/// Get i-th row from cache
/// </summary>
/// <param name="i">i-th row</param>
/// <param name="len">block length</param>
/// <returns>array with i-th row kernel products</returns>
public float[] GetQ(int i, int len)
{
float[] data = null;
int start = 0;
//data = new float[problem.ElementsCount];
//for (int j = start; j < len; j++)
// data[j] = (y[i] * y[j] * kernel.Product(i, j));
//with cache
if ((start = cache.GetData(i, ref data, len)) < len)
{
kernel.AllProducts(i, data);
//System.IO.File.WriteAllLines("kernel.txt", data.Select(d => d.ToString()));
// for (j = start; j < len; j++)
// data[j] = (y[i] * y[j] * kernel.Product(i, j));
//var data2 = kernel.AllProducts(i);
//for (int k = 0; k < len; k++)
//{
// if (data[k] != data2[k])
// throw new InvalidOperationException(string.Format("different val on {0} position", k));
//}
//var partition = Partitioner.Create(start, len);
//Parallel.ForEach(partition, (range) =>
//{
// for (int k = range.Item1; k < range.Item2; k++)
// {
// data[k] = (y[i] * y[k] * kernel.Product(i, k));
// }
//});
}
else
{
CacheHit++;
}
//string debStr = i.ToString() + " ->" + string.Join("; ", data);
//Debug.WriteLine(debStr);
//Debug.WriteLine(i);
return(data);
}