tidyterra (version 0.7.0)

distinct.SpatVector: Keep distinct/unique rows and geometries of SpatVector objects

Description

Keep only unique/distinct rows and geometries from a SpatVector.

Usage

# S3 method for SpatVector
distinct(.data, ..., .keep_all = FALSE)

Value

A SpatVector object.

Arguments

.data

A SpatVector created with terra::vect().

...

<data-masking> Optional variables to use when determining uniqueness. If there are multiple rows for a given combination of inputs, only the first row will be preserved. If omitted, will use all variables in the data frame. There is a reserved variable name, geometry, that would remove duplicate geometries. See Methods.

.keep_all

If TRUE, keep all variables in .data. If a combination of ... is not distinct, this keeps the first row of values.

<a href="https://CRAN.R-project.org/package=terra"><span class="pkg">terra</span></a> equivalent

terra::unique()

Methods

Implementation of the generic dplyr::distinct() function.

SpatVector

It is possible to remove duplicate geometries including the geometry variable explicitly in the ... call. See Examples.

See Also

dplyr::distinct(), terra::unique()

Other dplyr verbs that operate on rows: arrange.SpatVector(), filter.Spat, slice.Spat

Other dplyr methods: arrange.SpatVector(), bind_cols.SpatVector, bind_rows.SpatVector, count.SpatVector(), filter-joins.SpatVector, filter.Spat, glimpse.Spat, group-by.SpatVector, mutate-joins.SpatVector, mutate.Spat, pull.Spat, relocate.Spat, rename.Spat, rowwise.SpatVector(), select.Spat, slice.Spat, summarise.SpatVector()

Examples

library(terra)

v <- vect(system.file("ex/lux.shp", package = "terra"))

# Create a vector with dups
v <- v[sample(seq_len(nrow(v)), 100, replace = TRUE), ]
v$gr <- sample(LETTERS[1:3], 100, replace = TRUE)

# All duplicates
ex1 <- distinct(v)
ex1

nrow(ex1)

# Duplicates by NAME_1
ex2 <- distinct(v, gr)
ex2
nrow(ex2)

# Same but keeping all cols
ex2b <- distinct(v, gr, .keep_all = TRUE)
ex2b
nrow(ex2b)


# Unique geometries
ex3 <- distinct(v, geometry)

ex3
nrow(ex3)
# Same as terra::unique()
terra::unique(ex3)

# Unique keeping info
distinct(v, geometry, .keep_all = TRUE)