[Help-glpk] Multi-dimensional data question

[Jon Spragg]

Hi,

 

In the glpk distribution there are examples of two dimensional model objects, such as

 

param a{i in I, j in J}, >= 0;

 

to model, say, geographical coordinates.  These structures are initialised in the data section using code such as:

 

 

param a : 1  2  3  4  5 :=
      1   12 15 12 10 11
      2   23 25 19 11 15
      3   15 40 21 75 8
      4   9  2  9  32 31
      5   15 18 19 10 11;

 

However, if we define a structure with more than two dimensions, such as

 

param a{i in I, j in J, k in K}, >= 0;

 

to represent, say, the amount of resource capacity k at coordinate i, j, then how do you initialise the structure in the data section of the mod file? This is  not clear to me from the documentation supplied with the distribution.

 

Thank you for any help.

 

Jon Spragg