mean_center {centr} | R Documentation |
Mean Center
Description
Mean center calculates the geographic average center. One can specify the groups to calculate individual centers for groups and weights for each individual point. It is analagous to the ArcGIS Pro Mean Center tool.
If st_is_longlat(x)
, mean center is calculated assuming a
spherical Earth. Projected data is calculated assuming a
"flat" Earth.
Usage
mean_center(x, group = NULL, weight = NULL)
Arguments
x |
Input POINT or POLYGON simple features |
group |
name of character column specifying groups to calculate individual mean centers for |
weight |
name of numeric weight column specifying an individual point's contribution to the mean center |
Value
An sf object with a mean center for each group
Examples
df <- data.frame(
lon = c(20, 50, 30, 80, 10),
lat = c(25, 70, 30, 50, 30),
grp = c("a", "b", "a", "b", "a"),
wt = c(1, 5, 1, 3, 2)
)
x <- sf::st_as_sf(df, coords = c("lon", "lat"), crs = 4326)
mean_center(x, group = "grp", weight = "wt")
[Package centr version 0.1.0 Index]