/// <summary>
/// Returns a vector averaged from the data vectors
/// </summary>
/// <param name="indices">Indices of the data vectors to use in the averaged vector</param>
public IVector GetAverageFromData(IReadOnlyList <int> indices)
{
using (var data = _lap.CreateMatrixFromColumns(indices.Select(i => _data[i]).ToList())) {
var result = data.RowSums();
result.Multiply(1f / indices.Count);
return(result);
}
}
public void TestMatrixCreationFromColumns()
{
var values = new[] {
Enumerable.Range(0, 10).Select(v => (float)v).ToArray(),
Enumerable.Range(0, 10).Select(v => (float)v * 2).ToArray(),
Enumerable.Range(0, 10).Select(v => (float)v * 3).ToArray(),
};
var cpuRowList = values.Select(v => _cpu.CreateVector(v)).ToList();
var cpuMatrix = _cpu.CreateMatrixFromColumns(cpuRowList);
var gpuRowList = values.Select(v => _cuda.CreateVector(v)).ToList();
using (var gpuMatrix = _cuda.CreateMatrixFromColumns(gpuRowList)) {
FloatingPointHelper.AssertEqual(cpuMatrix.AsIndexable(), gpuMatrix.AsIndexable());
}
gpuRowList.ForEach(v => v.Dispose());
}