Re: [Help-glpk] [Fwd: GLPK printing with if and iterative loop (continued)]

[Oscar Gustafsson]

OK, I think this should work. :-)

printf{i in Trainer: sum{j4 in Course4} x4[i,j4] + sum{j5 in Course5} 
x5[i,j5] + sum{j6 in Course6} x6[i,j6] = 0} "%s  ", i;

Interpret it as:

printf{for ...: if ...}

Regards

Oscar

>
On 02/20/2011 05:11 PM, Andrew Makhorin wrote:
> -------- Forwarded Message --------
> From: Alan Zinober<address@hidden>
> To: address@hidden
> Subject: GLPK printing with if and iterative loop (continued)
> Date: Sun, 20 Feb 2011 15:18:09 +0000
>
>
>
> Oscar, many thanks for your assistance.
>
> However, I think I actually need a sum ...
>
> With your recommendation for my question below I used:
>
> printf {i in Trainer, j4 in Course4, j5 in Course5, j6 in Course6:
> x4[i,j4] + x5[i,j5] + x6[i,j6] = 0} "%s ",i;
>
> to obtain:
>
> A A A A B B B B C C D D D D E E G G H H H H I I I I J J J J K K
>
> My Trainer set is    A B C D E F G H I J K
>
> In fact I wish to print
>
> A  B  D  G  H  I  J
>
> where i is printed only if there are 4 repeats above (when using your
> recommendation).
>
> i.e. for i iterating and for summing over the cases j4, j5, j6 jointly.
>
> for Trainer i,   if sum (iterating over j4, j5, j6)  = 0, then print i.
>
> eg  printf (if  x4[i,C41] + x4[i,C42] + x5[i,C51], + x5{i,C52] +
> x5[i,C53] + x6[i,C61] = 0 then "%s  "), i);
>
>
> Why should this command below
>
> for {i in Trainer}
>   printf (if sum{j4 in Course4} x4[i,j4]
>               + sum{j5 in Course5} x5[i,j5]
>                 + sum{j6 in Course6} x6[i,j6] = 0 then "%s "),i;
>
> print     A B 0D 000H I J 0
>
> I believe that the printout should be      A B D H I J
>
> I do not see why 0 is printed if the sum is not zero (for C, E, F, G,
> K).
>
> My Trainer set is    A B C D E F G H I J K.
>
>     Alan
>
>
>      Alan
>
>
>
> On 19/02/2011 21:40, Oscar Gustafsson wrote:
> > Alan,
> >
> > the following should work:
> >
> > printf{i in Trainer, j4 in Course4, j5 in Course5, j6 in Course6:
> > x4[i,j4] + x5[i,j5] + x6[i,j6] = 0} ...
> >
> > Regards
> >
> > Oscar
> >
> > Andrew Makhorin skrev 2011-02-19 22:26:
> > > -------- Forwarded Message --------
> > > From: Alan Zinober<address@hidden>
> > > To: address@hidden
> > > Subject: GLPK printing with if and iterative loop
> > > Date: Sat, 19 Feb 2011 17:27:04 +0000
> > >
> > > I need to print the Trainer names only when
> > >
> > >         x4[i,j4] + x5[i,j5] + x6[i,j6] = 0
> > >
> > > I declare:
> > >
> > > set Trainer;           different trainer names
> > >
> > > set Course4;         different course names
> > > set Course5;         different course names
> > > set Course6;         different course names
> > >
> > > var x4{Trainer, Course4}>=0, binary;
> > > var x5{Trainer, Course5}>=0, binary;
> > > var x6{Trainer, Course6}>=0, binary;
> > >
> > >
> > > Essentially I need a print statement with the logic of the code
> > > below
> > > but do not know how to set up
> > > j4 iterated on Course 4, j5 iterated on Course5, j6 iterated on
> > > Course6 :
> > >
> > > for {i in Trainer}
> > >
> > >         printf (if x4[i,j4 iterated on Course4] + x5[i,j5 iterated
> > > on
> > > Course 5]
> > >                              + x6[i,j6 iterated on Course6] =0 then
> > > "%s
> > > "),Trainer[i];
> > >
> > >         Alan
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Help-glpk mailing list
> > > address@hidden
> > > http://lists.gnu.org/mailman/listinfo/help-glpk
> >
> >
> > _______________________________________________
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>
>
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