find_index_in_2D_df: Find index from a 2-D data frame (e.g., map)

In seunjeong/rmapping: Collection of Small Functions for R Mapping

Description

Find index from a 2-D data frame (e.g., map)

Usage

find_index_in_2D_df(
  data_2D,
  query,
  num_index_per_query = 1,
  x = "lon",
  y = "lat",
  x_query = "lon",
  y_query = "lat"
)

Arguments

data_2D	2-D data frame where x/y or lon/lat are available and from which the index is derived.
query	Data frame for query. Each row of the query (2-d matrix or 2-column data frame) looks for the closest value in distance (to the row) from the data and return its index corresponding to that value in data_2D.
num_index_per_query	the number of indices to be returned - typically just one.
x	the x (axis) name in data_2D
y	the y (axis) name in data_2D
x_query	the x (axis) name in the query data frame
y_query	the y (axis) name in the query data frame

seunjeong/rmapping documentation built on Dec. 13, 2020, 3:36 a.m.