padding -- optional keyword argumentBy definition, applying a windowed function over data will result in fewer items than are in the original data. To add the missing items, select a padding value using the padding keyword argument e.g. padding=missing.
By default, padding is applied at the begining of the result.
- by default, the padding value is placed at the lowest indices
To apply padding at the end of the result, set atend=true.
- that way the padding value is placed at the highest indices