Trim coordinates from shape

coo_trim_head removes the first n coordinates from shape, coo_trim_tail removes the last n coordinates, coo_trim does both.

coo_trim(x, n, from_col, to_col, ...)

coo_trim_head(x, n, from_col, to_col, ...)

coo_trim_tail(x, n, from_col, to_col, ...)

Arguments

x

coo_single, coo_list or mom_tbl
n

integer how many coordinates shall we trim
from_col

colnames from where to get the coo_list and how to name the resulting one (only for mom_tbl method)
to_col

colnames from where to get the coo_list and how to name the resulting one (only for mom_tbl method)
...

useless here

Value

a coo_single, coo_list or mom_tbl

Functions

  • coo_trim_head: Trims head of shape

  • coo_trim_tail: Trims tail of shape

See also

Other coo_modifyers: coo_align(), coo_baseline(), coo_center(), coo_reflect, coo_rev(), coo_rotatecenter(), coo_rotate(), coo_sample_rr(), coo_sample(), coo_scale(), coo_shear(), coo_slide(), coo_split(), coo_template(), coo_trans(), coo_up()

Examples


x <- bot %>% pick(1) %>% coo_sample(12)

coo_trim(x, 5)
#> # A tibble: 2 x 2
#>       x     y
#>   <dbl> <dbl>
#> 1   305   302
#> 2   295   523
#> ❯coo_single with 2 coordinates
coo_trim_head(x, 5)
#> # A tibble: 7 x 2
#>       x     y
#>   <dbl> <dbl>
#> 1   305   302
#> 2   295   523
#> 3   296   713
#> 4   240   912
#> 5   205  1101
#> 6   110  1002
#> 7    82   781
#> ❯coo_single with 7 coordinates
coo_trim_tail(x, 5)
#> # A tibble: 7 x 2
#>       x     y
#>   <dbl> <dbl>
#> 1   305   302
#> 2   295   523
#> 3   296   713
#> 4   240   912
#> 5   205  1101
#> 6   110  1002
#> 7    82   781
#> ❯coo_single with 7 coordinates