/// <summary>
/// Computes FFT for the given sampleset.
/// </summary>
/// <param name="Samples">Sampleset on which to compute a FFT</param>
public FFT(List <double> Samples, List <BandFrequencyDefinition> CustomBands = null)
{
using (ILScope.Enter())
{
ILInArray <double> inArr = Samples.ToArray();
ILRetArray <complex> output = ILMath.fft(inArr);
rawFFTOutput = output.ToArray();
}
ComputeFrequencyPowerSamples();
//FrequencyBands
ComputeAbsoluteBandPower(BandFrequencyDefinition.Delta);
ComputeAbsoluteBandPower(BandFrequencyDefinition.Theta);
ComputeAbsoluteBandPower(BandFrequencyDefinition.Alpha);
ComputeAbsoluteBandPower(BandFrequencyDefinition.Beta);
ComputeAbsoluteBandPower(BandFrequencyDefinition.Gamma);
if (CustomBands != null)
{
foreach (BandFrequencyDefinition customBand in CustomBands)
{
ComputeAbsoluteBandPower(customBand);
}
}
}
public static EigenObject GetEigen(double[,] a)
{
int width = a.GetLength(0);
double[] array = new double[width * width];
for (int i = 0; i < width; i++)
{
for (int j = 0; j < width; j++)
{
array[i * width + j] = a[i, j];
}
}
ILRetArray <double> A = ILMath.array(
array, width, width);
ILArray <complex> eigVectors = ILMath.array(new complex(0, 0), width * width);
ILArray <complex> eigValues = ILMath.eig(A, eigVectors);
return(new EigenObject(eigVectors, eigValues, width));
}
/// <summary>
/// Creates an ILPoints-object at the specified coordinates and with a handler to set the
/// specified label for the coordinates invisible.
/// </summary>
/// <param name="x">First coordinate of the point. Must be a one-dimensional array with one element and must not be null!</param>
/// <param name="y">Second coordinate of the point. Must be a one-dimensional array with one element and must not be null!</param>
/// <param name="z">Third coordinate of the point. Must be a one-dimensional array with one element and must not be null!</param>
/// <param name="l">Label that will show the coordinates of the point. Must not be null.</param>
/// <returns>An interactive point that displays its coordinates.</returns>
private ILPoints createPoint(ILRetArray<float> x, ILRetArray<float> y, ILRetArray<float> z, Label l)
{
if (x == null)
throw new ArgumentNullException("Parameter x must not be null!");
if (y == null)
throw new ArgumentNullException("Parameter y must not be null!");
if (z == null)
throw new ArgumentNullException("Parameter z must not be null!");
if (l == null)
throw new ArgumentNullException("Parameter l must not be null!");
if (x.Size.NumberOfElements != 1)
throw new Exception("Parameter x does not contain exactly one element!");
if (y.Size.NumberOfElements != 1)
throw new Exception("Parameter y does not contain exactly one element!");
if (z.Size.NumberOfElements != 1)
throw new Exception("Parameter z does not contain exactly one element!");
ILArray<float> coors = ILMath.zeros<float>(0);
coors[0, 0] = x;
coors[1, 0] = y;
coors[2, 0] = z;
ILPoints point = new ILPoints
{
Positions = coors,
Color = Color.Black
};
point.MouseLeave += (s, a) =>
{
l.Visible = false;
};
return point;
}
