sfg_multipoint {sfheaders}

sfg multipoint

Description

constructs sfg MULTIPOINT object

Usage

sfg_multipoint(obj, x = NULL, y = NULL, z = NULL, m = NULL)

Arguments

obj

matrix or data.frame

x

x geometry column

y

y geometry column

z

z geometry column

m

m geometry column

Value

sfg object of MULTIPOINT geometry

Examples

sfg_multipoint( 1:2 )
sfg_multipoint( 1:3 )
sfg_multipoint( 1:4 )

sfg_multipoint( matrix( 1:3, ncol = 3 ) )
sfg_multipoint( data.frame( x = 1, y = 2, z = 3 )  )

sfg_multipoint( matrix( 1:4, ncol = 2 ) )
sfg_multipoint( matrix( 1:24, ncol = 2, byrow = TRUE ) )
sfg_multipoint( matrix( 1:24, ncol = 3, byrow = TRUE ) )
sfg_multipoint( matrix( 1:24, ncol = 4, byrow = TRUE ) )

sfg_multipoint( data.frame( x = 1:5, y = 1:5 ) )

## using columns

sfg_multipoint( matrix( 1:24, ncol = 4, byrow = TRUE ), x = 1, y = 2 )
sfg_multipoint( matrix( 1:24, ncol = 4, byrow = TRUE ), x = 1, y = 2, z = 3 )
sfg_multipoint( matrix( 1:24, ncol = 4, byrow = TRUE ), x = 3, y = 4 )

df <- data.frame( x = 1:5, y = 1:5, z = 11:15, m = 11:15 )
sfg_multipoint( df, x = "x", y = "y" )
sfg_multipoint( df, x = "x", y = "y", z = "z" )
sfg_multipoint( df, x = "x", y = "y", z = "z", m = "m" )