polish_data: polish data from the uncomtrade database
In zlfccnu/econophysics: Functions for econophysics

polish data from the uncomtrade database

polish_data(
  data,
  merge = FALSE,
  metric_var = c("weight", "value"),
  weight_method = c("mean", "max", "min"),
  continent_info = continent,
  keep_world = FALSE
)

`data`	a tidyverse like tibble obtain from the UNCOMTRADE data base
`merge`	merge HK and Maco to mainland China or not
`metric_var`	whether use the weight(by KG) of the cargo or the value(by USD)
`weight_method`	the evaluation method to polish the metric variable
`continent_info`	the supplementary data for the continent information
`keep_world`	whether keep the data for world total