trade_data2net: convert the uncomtrade data tibble to igraph networks
In zlfccnu/econophysics: Functions for econophysics

convert the uncomtrade data tibble to igraph networks

trade_data2net(
  trade_data,
  Y = TRUE,
  weight_var = c("netweight_ton", "trade_value_usd_k")
)

`trade_data`	a tidyverse like tibble generate by the "polish_data" function
`Y,`	TRUE means we use the year variable to slice the trade data into different pieces and will return a graph list, FALSE means we aggregate the trade information into a single network
`weight_var`	the name of the variable used to determine the edge weight, either cargo weight by metric tone or cargo value by USD 1000 dollars