Partially splits the input to a list according to the rolling window size.

partial_slider(.x, .size = 1, .step = 1, .fill = NA,
.align = "right", .bind = FALSE)
partial_pslider(..., .size = 1, .step = 1, .fill = NA,
.align = "right", .bind = FALSE)

## Arguments

.x |
An object to slide over. |

.size |
An integer for window size. If positive, moving forward from left
to right; if negative, moving backward (from right to left). |

.step |
A positive integer for calculating at every specified step
instead of every single step. |

.fill |
A value to fill at the left/center/right of the data range depending
on `.align` (`NA` by default). `NULL` means no filling. |

.align |
Align index at the "**r**ight", "**c**entre"/"center", or "**l**eft"
of the window. If `.size` is even for center alignment, "centre-right" & "centre-left"
is needed. |

.bind |
If `.x` is a list, should `.x` be combined before applying `.f` ?
If `.x` is a list of data frames, row binding is carried out. |

... |
Additional arguments passed on to the mapped function. |

## Examples

#> [[1]]
#> [1] 1 NA 3
#>
#> [[2]]
#> [1] NA 3 4
#>
#> [[3]]
#> [1] 3 4 5
#>

partial_slider(x, .size = 3)

#> [[1]]
#> [1] NA NA 1
#>
#> [[2]]
#> [1] NA 1 NA
#>
#> [[3]]
#> [1] 1 NA 3
#>
#> [[4]]
#> [1] NA 3 4
#>
#> [[5]]
#> [1] 3 4 5
#>