Read and interpret network data

Read a csv file with a specific format (see Details) and intepret it as network directed data with possibly weighted edges.

read_network(x)

Arguments

x

character. Path of csv file

Value

object of class igraph

Details

The file must be plain text with comma-separated columns and variable names in the first line. Field separators other than comma are also supported. In particular, semi-colon field separators and comma decimal separator. There must be either 6 or 7 columns in the same order and of the same types as follows:

  • origin character

  • destination character

  • lon_orig numeric (decimal degrees, WGS84)

  • lat_orig numeric (decimal degrees, WGS84)

  • lon_dest numeric (decimal degrees, WGS84)

  • lat_dest numeric (decimal degrees, WGS84)

  • volume Optional. directed flux in some consistent unit

Variable names can be different. If strings contain spaces they must be quoted.

Examples

  d <- data.frame(from = "A", to = "B", fx = 0, fy = 0, tx = 1, ty = 1)
  tf <- tempfile()
  write.csv(d, tf, row.names = FALSE)
  read_network(tf)
#> IGRAPH d1ae7cd DN-- 2 1 -- 
#> + attr: name (v/c)
#> + edge from d1ae7cd (vertex names):
#> [1] A->B