Add column subquadrat based on QX and QY coordinates.
add_subquad(data, x_q, y_q = x_q, x_sq, y_sq = x_sq, subquad_offset = NULL)A dataframe with quadrat coordinates QX and QY (e.g. a
ViewFullTable).
Size in meters of a quadrat's side. For ForestGEO sites, a common value is 20.
Size in meters of a subquadrat's side. For ForestGEO sites, a common value is 5.
Either -1 or 1, to rest or add one unit to the
digit of each subquadrat that represents the column number.
First column is 0 First column is 1
----------------- -----------------
04 14 24 34 14 24 34 44
03 13 23 33 13 23 33 43
02 12 22 32 12 22 32 42
01 11 21 31 11 21 31 41
Returns data with the additional variable subquadrat.
Other functions to add columns to dataframes:
add_status_tree(),
add_var()
Other functions for ForestGEO data:
add_status_tree(),
add_var()
Other functions for fgeo vft:
add_status_tree(),
add_var(),
guess_plotdim(),
pick_drop
# styler: off
vft <- tribble(
~QX, ~QY,
17.9, 0,
4.1, 15,
6.1, 17.3,
3.8, 5.9,
4.5, 12.4,
4.9, 9.3,
9.8, 3.2,
18.6, 1.1,
17.3, 4.1,
1.5, 16.3
)
# styler: on
add_subquad(vft, 20, 20, 5, 5)
#> # A tibble: 10 × 3
#> QX QY subquadrat
#> <dbl> <dbl> <chr>
#> 1 17.9 0 41
#> 2 4.1 15 14
#> 3 6.1 17.3 24
#> 4 3.8 5.9 12
#> 5 4.5 12.4 13
#> 6 4.9 9.3 12
#> 7 9.8 3.2 21
#> 8 18.6 1.1 41
#> 9 17.3 4.1 41
#> 10 1.5 16.3 14
add_subquad(vft, 20, 20, 5, 5, subquad_offset = -1)
#> # A tibble: 10 × 3
#> QX QY subquadrat
#> <dbl> <dbl> <chr>
#> 1 17.9 0 31
#> 2 4.1 15 04
#> 3 6.1 17.3 14
#> 4 3.8 5.9 02
#> 5 4.5 12.4 03
#> 6 4.9 9.3 02
#> 7 9.8 3.2 11
#> 8 18.6 1.1 31
#> 9 17.3 4.1 31
#> 10 1.5 16.3 04