nimble.fill.backwardFill

nimble.fill.backwardFill(vector, match)

Fill matched values with the next unmatched value.

Each matching value will be filled with the first non-matching value occurring after to the matched value. An exception will be raised if the last value is a match, since there is not a valid value to reference.

Parameters:

  • vector (nimble point or feature) – A nimble Base object containing one point or feature.

  • match (value or function) –

    • value - The value which should be filled if it occurs in the data.

    • function - Input a value and return True if that value should be filled. Nimble offers common use-case functions in its match module.

Returns:

list – The vector values with the backward filled values replacing the match values.

See also

forwardFill, nimble.match

Examples

Match a value.

>>> lst = [1, 'na', 3, 'na', 5]
>>> X = nimble.data(lst)
>>> backwardFill(X, 'na')
<DataFrame 1pt x 5ft
     0  1  2  3  4
   ┌──────────────
 0 │ 1  3  3  5  5
>

Match using a function from nimble’s match module.

>>> from nimble import match
>>> lst = [6, 0, 2, 0, 4]
>>> X = nimble.data(lst)
>>> backwardFill(X, match.zero)
<Matrix 1pt x 5ft
     0  1  2  3  4
   ┌──────────────
 0 │ 6  2  2  4  4
>