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weightfield

Get or set weight field in SpatialLinesNetwork

Description

Get or set value of weight field in SpatialLinesNetwork

Usage

weightfield(x)

weightfield(x, varname) <- value

weightfield(x, varname) <- value

## S4 method for signature 'SpatialLinesNetwork'
weightfield(x)

## S4 method for signature 'sfNetwork'
weightfield(x)

## S4 replacement method for signature 'SpatialLinesNetwork,ANY'
weightfield(x) <- value

## S4 replacement method for signature 'sfNetwork,ANY'
weightfield(x) <- value

## S4 replacement method for signature 'SpatialLinesNetwork,character'
weightfield(x, varname) <- value

## S4 replacement method for signature 'sfNetwork,character'
weightfield(x, varname) <- value

Arguments

x

SpatialLinesNetwork to use
varname

The name of the variable to set/use.
value

Either the name of the variable to use as the weight field or a dataframe or vector containing the weights to use if varname is passed to the replacement function. If the dataframe contains multiple columns, the column with the same name as varname is used, otherwise the first column is used.

Details

These functions manipulate the value of weightfield in a SpatialLinesNetwork. When changing the value of weightfield, the weights of the graph network are updated with the values of the corresponding variables.

Examples

# with sp objects
data(routes_fast)
rnet <- overline(routes_fast, attrib = "length")
sln <- SpatialLinesNetwork(rnet)
weightfield(sln) <- "length"
weightfield(sln, "randomnum") <- sample(1:10, size = nrow(sln@sl), replace = TRUE)
data(routes_fast_sf)
rnet <- overline(routes_fast_sf, attrib = "length")
sln <- SpatialLinesNetwork(rnet)
weightfield(sln) <- "length"
sln@sl$randomnum <- sample(1:10, size = nrow(sln@sl), replace = TRUE)
weightfield(sln) <- "randomnum"
# todo: show the difference that it makes
stplanr

Sustainable Transport Planning

v0.8.2
MIT + file LICENSE
Authors
Robin Lovelace [aut, cre] (<https://orcid.org/0000-0001-5679-6536>), Richard Ellison [aut], Malcolm Morgan [aut] (<https://orcid.org/0000-0002-9488-9183>), Barry Rowlingson [ctb], Nick Bearman [ctb], Nikolai Berkoff [ctb], Scott Chamberlain [rev] (Scott reviewed the package for rOpenSci, see https://github.com/ropensci/onboarding/issues/10), Mark Padgham [ctb], Andrea Gilardi [ctb] (<https://orcid.org/0000-0002-9424-7439>)
Initial release

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