gdxrrw: Exchanging Data Between GAMS and R

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Background: Why & What Basic Usage Example Applications Conclusion Euro TSP Visualizing a TSP on R’s eurodist data Start with R’s eurodist data Write data (cities and distances) to GDX Solve TSP in GAMS Dump tour to GDX Read tour into R Plot cities and tour S. Dirkse et al. (GAMS Development) gdxrrw Phoenix, 15 Oct 2012 28 / 42
Background: Why & What Basic Usage Example Applications Conclusion Euro TSP TSP model in GAMS s e t s i i ’ s e t o f c i t i e s ’ ; parameter c ( i i , i i ) ’ i n t e r −c i t y d i s t a n c e s ’ ; $gdxin e u r o d i s t $ l o a d i i =c i t i e s c=d i s t $gdxin $ i n c l u d e t s p d s e X s c a l a r s modelstat , s o l v e s t a t ; m o d e l s t a t = DSE . m o d e l s t a t ; s o l v e s t a t = DSE . s o l v e s t a t ; execute unload ’ e u r o s o l ’ , modelstat , s o l v e s t a t , i i , t o u r ; S. Dirkse et al. (GAMS Development) gdxrrw Phoenix, 15 Oct 2012 29 / 42
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gdxrrw: Exchanging Data Between GAMS and R

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