add_subquad {fgeo.tool}

Add column subquadrat based on QX and QY coordinates.

Description

Add column subquadrat based on QX and QY coordinates.

Usage

add_subquad(data, x_q, y_q = x_q, x_sq, y_sq = x_sq, subquad_offset = NULL)

Arguments

data

A dataframe with quadrat coordinates QX and QY (e.g. a ViewFullTable).

x_q, y_q

Size in meters of a quadrat's side. For ForestGEO sites, a common value is 20.

x_sq, y_sq

Size in meters of a subquadrat's side. For ForestGEO sites, a common value is 5.

subquad_offset

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

Value

Returns data with the additional variable subquadrat.

Author(s)

Anudeep Singh and Mauro Lepore.

See Also

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

Examples

# 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)

add_subquad(vft, 20, 20, 5, 5, subquad_offset = -1)