/// <summary>
/// EP message to 'subvector'
/// </summary>
/// <param name="SourceMean">Buffer 'SourceMean'.</param>
/// <param name="SourceVariance">Buffer 'SourceVariance'.</param>
/// <param name="startIndex">Constant value for 'startIndex'.</param>
/// <param name="result">Modified to contain the outgoing message</param>
/// <returns><paramref name="result"/></returns>
/// <remarks><para>
/// The outgoing message is the factor viewed as a function of 'subvector' conditioned on the given values.
/// </para></remarks>
public static VectorGaussian SubvectorAverageConditional([Fresh] Vector SourceMean, [Fresh] PositiveDefiniteMatrix SourceVariance, int startIndex, VectorGaussian result)
{
PositiveDefiniteMatrix subVariance = new PositiveDefiniteMatrix(result.Dimension, result.Dimension);
subVariance.SetToSubmatrix(SourceVariance, startIndex, startIndex);
Vector subMean = Vector.Zero(result.Dimension);
subMean.SetToSubvector(SourceMean, startIndex);
result.SetMeanAndVariance(subMean, subVariance);
return(result);
}
/// <summary>
/// EP message to 'subvector'
/// </summary>
/// <param name="SourceMean">Buffer 'SourceMean'.</param>
/// <param name="SourceVariance">Buffer 'SourceVariance'.</param>
/// <param name="startIndex">Constant value for 'startIndex'.</param>
/// <param name="result">Modified to contain the outgoing message</param>
/// <returns><paramref name="result"/></returns>
/// <remarks><para>
/// The outgoing message is the factor viewed as a function of 'subvector' conditioned on the given values.
/// </para></remarks>
public static VectorGaussian SubvectorAverageConditional([Fresh] Vector SourceMean, [Fresh] PositiveDefiniteMatrix SourceVariance, int startIndex, VectorGaussian result)
{
PositiveDefiniteMatrix subVariance = new PositiveDefiniteMatrix(result.Dimension, result.Dimension);
subVariance.SetToSubmatrix(SourceVariance, startIndex, startIndex);
Vector subMean = Vector.Zero(result.Dimension);
subMean.SetToSubvector(SourceMean, startIndex);
result.SetMeanAndVariance(subMean, subVariance);
return result;
}
