This is the plot done using Guy Abel's code in his "migest" R package. It shows the average inter- and intra-regional flows of migration from 2005 to 2010, based on place of birth data. Unit is in millions. The arrows indicate direction of flows (as do their colors), while their sizes indicate the magnitude of flows. The width of a region's arch indicates the total migration flow for that region. It seems that accept for Latin America & Caribbean, intra- dominates inter-regional migration in this 5-year period. I will probably use this setting to plot a similar figure with my bilateral trade cost data in the future.
See more about the guiding steps in Guy's blog here and the blog of his co-author Nikola Sander here. The full data (with country-level data) as well as an visually stunning interactive figure are accessible in the authors' migration project home page.
Update: After one day tinkering I was able to produce an interactive plot of bilateral export flows, using the 2013 East Asian intra-regional data provided by one of my fellow PhD Student at UWA (Son Nguyen) and the code in the developing R package "chorddiag". There is an issue with the colors, as they don't show up properly in some computers. See the plot in my subsequent blog here, or on Rstudio live server at http://rpubs.com/ranma1202/292965
Update: After one day tinkering I was able to produce an interactive plot of bilateral export flows, using the 2013 East Asian intra-regional data provided by one of my fellow PhD Student at UWA (Son Nguyen) and the code in the developing R package "chorddiag". There is an issue with the colors, as they don't show up properly in some computers. See the plot in my subsequent blog here, or on Rstudio live server at http://rpubs.com/ranma1202/292965
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