Resample the series based on a provided collection of keys. The values of the series are aggregated into chunks based on the specified keys. Depending on `direction`, the specified key is either used as the smallest or as the greatest key of the chunk (with the exception of boundaries that are added to the first/last chunk). Such chunks are then aggregated using the provided `valueSelector` and `keySelector` (an overload that does not take `keySelector` just selects the explicitly provided key). ## Parameters - `keys` - A collection of keys to be used for resampling of the series - `direction` - If this parameter is `Direction.Forward`, then each key is used as the smallest key in a chunk; for `Direction.Backward`, the keys are used as the greatest keys in a chunk. - `valueSelector` - A function that is used to collapse a generated chunk into a single value. Note that this function may be called with empty series. ## Remarks This operation is only supported on ordered series. The method throws `InvalidOperationException` when the series is not ordered. [category:Resampling]

public Series<K, a> Resample<a>(
	IEnumerable<K> keys,
	Direction direction,
	Func<K, Series<K, V>, a> valueSelector
)