/// <summary>
/// Performs the following operation for <paramref name="length"/> consecutive entries starting from the provided
/// indices: this[i] = this[i] + <paramref name="sourceVector"/>[i].
/// </summary>
/// <param name="destinationIndex">The index into this <see cref="IVector"/> where to start overwritting. Constraints:
/// <paramref name="destinationIndex"/> + <paramref name="length"/> <= this.<see cref="IIndexable1D.Length"/>.
/// </param>
/// <param name="sourceVector">The other vector operand.</param>
/// <param name="sourceIndex">The index into <paramref name="sourceVector"/> where to start operating. Constraints:
/// <paramref name="sourceIndex"/> + <paramref name="length"/> <=
/// <paramref name="sourceVector"/>.<see cref="IIndexable1D.Length"/>.</param>
/// <param name="length">The number of entries to copy.</param>
/// <exception cref="Exceptions.NonMatchingDimensionsException">Thrown if <paramref name="length"/> and
/// <paramref name="destinationIndex"/> or <paramref name="sourceIndex"/> violate the described constraints.
/// </exception>
/// <exception cref="Exceptions.PatternModifiedException">Thrown if an entry this[i] needs to be overwritten, but that
/// is not permitted by the vector storage format.</exception>
public static void AddSubvectorIntoThis(this IVector destinationVector, int destinationIndex, IVectorView sourceVector,
int sourceIndex, int length)
=> destinationVector.AxpySubvectorIntoThis(destinationIndex, sourceVector, 1.0, sourceIndex, length);