Functions
def	get_model_text ()

Variables
	wb = open_workbook("..\\Data\\transport.xlsx")

	capacity = wb.sheet_by_name("capacity")

	demand = wb.sheet_by_name("demand")

	distance = wb.sheet_by_name("distance")

	ws = GamsWorkspace(system_directory = sys.argv[1])

	db = ws.add_database()

	i = db.add_set("i", 1, "Plants")

	j = db.add_set("j", 1, "Markets")

	capacity_param = db.add_parameter_dc("a", [i], "Capacity")

	demand_param = db.add_parameter_dc("b", [j], "Demand")

	distance_param = db.add_parameter_dc("d", [i,j], "Distance")

	value

tuple	keys = ( str(distance.cell_value(rx, 0)), str(distance.cell_value(0, cx)) )

	t10 = ws.add_job_from_string(get_model_text())

	opt = ws.add_options()

	all_model_types

	databases

Function Documentation

◆ get_model_text()

def transport10.get_model_text ( )

Definition at line 11 of file transport10.py.

def get_model_text():
     return '''
   Sets
        i   canning plants
        j   markets
  
   Parameters
        a(i)   capacity of plant i in cases
        b(j)   demand at market j in cases
        d(i,j) distance in thousands of miles
   Scalar f  freight in dollars per case per thousand miles /90/;
  
 $if not set gdxincname $abort 'no include file name for data file provided'
 $gdxin %gdxincname%
 $load i j a b d
 $gdxin
  
   Parameter c(i,j)  transport cost in thousands of dollars per case ;
  
             c(i,j) = f * d(i,j) / 1000 ;
  
   Variables
        x(i,j)  shipment quantities in cases
        z       total transportation costs in thousands of dollars ;
  
   Positive Variable x ;
  
   Equations
        cost        define objective function
        supply(i)   observe supply limit at plant i
        demand(j)   satisfy demand at market j ;
  
   cost ..        z  =e=  sum((i,j), c(i,j)*x(i,j)) ;
  
   supply(i) ..   sum(j, x(i,j))  =l=  a(i) ;
  
   demand(j) ..   sum(i, x(i,j))  =g=  b(j) ;
  
   Model transport /all/ ;
  
   Solve transport using lp minimizing z ;
  
   Display x.l, x.m ; '''
  
  

Variable Documentation

◆ all_model_types

transport10.all_model_types

Definition at line 96 of file transport10.py.

◆ capacity

transport10.capacity = wb.sheet_by_name("capacity")

Definition at line 59 of file transport10.py.

◆ capacity_param

transport10.capacity_param = db.add_parameter_dc("a", [i], "Capacity")

Definition at line 75 of file transport10.py.

◆ databases

transport10.databases

Definition at line 97 of file transport10.py.

◆ db

transport10.db = ws.add_database()

Definition at line 72 of file transport10.py.

◆ demand

transport10.demand = wb.sheet_by_name("demand")

Definition at line 60 of file transport10.py.

◆ demand_param

transport10.demand_param = db.add_parameter_dc("b", [j], "Demand")

Definition at line 76 of file transport10.py.

◆ distance

transport10.distance = wb.sheet_by_name("distance")

Definition at line 61 of file transport10.py.

◆ distance_param

transport10.distance_param = db.add_parameter_dc("d", [i,j], "Distance")

Definition at line 77 of file transport10.py.

◆ i

transport10.i = db.add_set("i", 1, "Plants")

Definition at line 73 of file transport10.py.

◆ j

transport10.j = db.add_set("j", 1, "Markets")

Definition at line 74 of file transport10.py.

◆ keys

tuple transport10.keys = ( str(distance.cell_value(rx, 0)), str(distance.cell_value(0, cx)) )

Definition at line 89 of file transport10.py.

◆ opt

transport10.opt = ws.add_options()

Definition at line 94 of file transport10.py.

◆ t10

transport10.t10 = ws.add_job_from_string(get_model_text())

Definition at line 93 of file transport10.py.

◆ value

transport10.value

Definition at line 81 of file transport10.py.

◆ wb

transport10.wb = open_workbook("..\\Data\\transport.xlsx")

Definition at line 57 of file transport10.py.

◆ ws

transport10.ws = GamsWorkspace(system_directory = sys.argv[1])

Definition at line 68 of file transport10.py.

Functions

Variables