gdxrrw: Exchanging Data Between GAMS and R

Background: Why & What Basic Usage Example Applications Conclusion
Usage detail
Generating a GDX file
Sets
i ’ c a n n i n g p l a n t s ’ / s e a t t l e , san−d i e g o , monterey /
j ’ markets ’ / new−y o r k , c h i c a g o , topeka , p h o e n i x /
i i ( i ) ’ a c t i v e p l a n t s ’ / s e a t t l e , san−d i e g o /
j j ( j ) ’ a c t i v e markets ’ / new−y o r k , c h i c a g o , topeka /
i j ( i , j ) ’ open r o u t e s ’ ;
i j ( i , j ) = y e s ;
Parameters
a ( i ) ’ c a p a c i t y o f p l a n t i i n c a s e s ’ /
s e a t t l e 350
san−d i e g o 600
monterey 400
/
b ( j ) ’ demand a t market j i n c a s e s ’ /
new−y o r k 325
c h i c a g o 300
topeka 275
p h o e n i x 375
/ ;
Table d ( i , j ) ’ d i s t a n c e i n 1K m i l e s ’
new−y o r k c h i c a g o topeka p h o e n i x
s e a t t l e 2 . 4 0 4 1 . 7 3 3 1 . 4 5 5 1 . 1 1 2
san−d i e g o 2 . 4 2 9 1 . 7 2 9 1 . 2 7 4 0 . 2 9 8
monterey 2 . 5 7 0 1 . 8 5 6 1 . 4 3 5 0 . 5 9 4 ;
S c a l a r f ’ f r e i g h t : $/ c a s e /1K m i l e s ’ /90/ ;
e x e c u t e u n l o a d ’ t r a n s ’ ;
S. Dirkse et al. (GAMS Development) gdxrrw Phoenix, 15 Oct 2012 10 / 42