[SCIP] reading in indexed sets with ZIMPL

[Benjamin Müller]

Dear James,

please note that "<3s,1n,2n> 4s" is a mapping and can not be stored in a 
set variable. What you probably want to do is something like:

     set Q := { read "haha.txt" as "<3s,1n,2n>" };
     param cost[Q] :=  read "haha.txt" as "<3s,1n,2n> 4s"

Here:

      http://zimpl.zib.de/download/zimpl.pdf

you find the ZIMPL user guide containing different examples, e.g., how 
to read in sets and parameters.


Best,
Benny

On 04.07.2016 12:08, James Cussens wrote:
> I am having trouble reading in indexed sets with ZIMPL. The following 
> ZIMPL input:
>
> STARTS
> set Q := { <"ab",1,2>, <"bc",2,3>, <"de",4,5> };
>
> #set cost[Q] := { read "haha.txt" as "<3s,1n,2n> 4s" };
> param cost[Q] :=  read "haha.txt" as "<3s,1n,2n> 4s" ;
> ENDS
>
> works fine with these 3 lines in haha.txt:
>
> 1:2:ab:con1
> 2:3:bc:con2
> 4:5:de:con3
>
> So all is well with an indexed parameter. But when I uncomment the set 
> definition line (and comment out the param one) I get:
>
>
> ****************************************************
> * Zuse Institute Mathematical Programming Language *
> * Release 3.3.3 Copyright (C)2012 by Thorsten Koch *
> ****************************************************
> *   This is free software and you are welcome to   *
> *     redistribute it under certain conditions     *
> *      ZIMPL comes with ABSOLUTELY NO WARRANTY     *
> ****************************************************
>
> Reading test.zpl
> Reading haha.txt
> *** Error 214: Wrong type of set elements -- wrong read template?
> *** File: test.zpl Line 3
> *** set cost[Q] := { read "haha.txt" as "<3s,1n,2n> 4s" };
> *** ^^^
>
> I notice that none of the examples in the ZIMPL manual involve reading 
> in indexed sets.
>
> Any help gratefully received!
>
> James
>
> -- 
> James Cussens
> Dept of Computer Science &
> York Centre for Complex Systems Analysis
> Room 326, The Hub, Deramore Lane            Tel    +44 (0)1904 325371
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>
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