.fill in stretch_dbl

[opoyc]

Having a tsibble, after creating a new variable with mutate, slice_dbl appends NA values to match the original number of rows, whereas stretch does not for .size=1.

x <- 1:10
slide_dbl(.x = x, .f = ~mean(.), .size = 2, .fill = NA)
stretch_dbl(.x = x, .f = ~mean(.), .init = 2, .fill = NA)

Am I missing something?

Nice package BTW!

[earowang]

The reason why no .fill in the stretch(), bc I'm not sure how to fill NA when the incrementing size is > 1. But I think I could add NA in the beginning of the each window size. I'll add .fill = NA for the v0.7.0 release. Thanks.

[earowang]

Now stretch() gains a new argument .fill = NA to ensure the output of the same length as the input. But I renamed the argument .size to .step.