AMPL Variables in subscripts are not yet allowed
I really hope someone can help with this...
This is what i have in the .mod file
set I := 1..10;
set J := 1..10;
set K := 1..2;
set W := 1..20;
param v{K, W};
param d{I, J};
var x1, integer;
var y1, integer;
var x2, integer;
var y2, integer;
var assist{W}, binary;
and this is the code generating error:
minimize nome: sum{w in W} (if (assist[w] == 0) then
(if (x1 >= v[1,w]) then
(if (y1 >= v[2,w]) then
(d[x1 - v[1,w],y1 - v[2,w]])....
where the error regards the last line and says:
Variables in subscripts are not yet allowed.
context: (d[x1 - v[1,w],y1 - >>> v[2,w]] <<< )
this is one of constraints (others are just the same):
subject to rangex1:
x1 > 0 && x1 <= 10;
ampl
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
add a comment |
I really hope someone can help with this...
This is what i have in the .mod file
set I := 1..10;
set J := 1..10;
set K := 1..2;
set W := 1..20;
param v{K, W};
param d{I, J};
var x1, integer;
var y1, integer;
var x2, integer;
var y2, integer;
var assist{W}, binary;
and this is the code generating error:
minimize nome: sum{w in W} (if (assist[w] == 0) then
(if (x1 >= v[1,w]) then
(if (y1 >= v[2,w]) then
(d[x1 - v[1,w],y1 - v[2,w]])....
where the error regards the last line and says:
Variables in subscripts are not yet allowed.
context: (d[x1 - v[1,w],y1 - >>> v[2,w]] <<< )
this is one of constraints (others are just the same):
subject to rangex1:
x1 > 0 && x1 <= 10;
ampl
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24
add a comment |
I really hope someone can help with this...
This is what i have in the .mod file
set I := 1..10;
set J := 1..10;
set K := 1..2;
set W := 1..20;
param v{K, W};
param d{I, J};
var x1, integer;
var y1, integer;
var x2, integer;
var y2, integer;
var assist{W}, binary;
and this is the code generating error:
minimize nome: sum{w in W} (if (assist[w] == 0) then
(if (x1 >= v[1,w]) then
(if (y1 >= v[2,w]) then
(d[x1 - v[1,w],y1 - v[2,w]])....
where the error regards the last line and says:
Variables in subscripts are not yet allowed.
context: (d[x1 - v[1,w],y1 - >>> v[2,w]] <<< )
this is one of constraints (others are just the same):
subject to rangex1:
x1 > 0 && x1 <= 10;
ampl
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
I really hope someone can help with this...
This is what i have in the .mod file
set I := 1..10;
set J := 1..10;
set K := 1..2;
set W := 1..20;
param v{K, W};
param d{I, J};
var x1, integer;
var y1, integer;
var x2, integer;
var y2, integer;
var assist{W}, binary;
and this is the code generating error:
minimize nome: sum{w in W} (if (assist[w] == 0) then
(if (x1 >= v[1,w]) then
(if (y1 >= v[2,w]) then
(d[x1 - v[1,w],y1 - v[2,w]])....
where the error regards the last line and says:
Variables in subscripts are not yet allowed.
context: (d[x1 - v[1,w],y1 - >>> v[2,w]] <<< )
this is one of constraints (others are just the same):
subject to rangex1:
x1 > 0 && x1 <= 10;
ampl
ampl
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
asked Nov 25 '18 at 0:49
AnnaSAnnaS
1
1
What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24
add a comment |
What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24
What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24
What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24
add a comment |
1 Answer
1
active
oldest
votes
As the error message says, you can't use decision variables within a subscript in AMPL. In this case x1 and y1 are decision variables, so d[x1 - v[1,w],y1 - v[2,w]] is not allowed. You'll need to reformulate the problem in a way that avoids this issue.
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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oldest
votes
active
oldest
votes
As the error message says, you can't use decision variables within a subscript in AMPL. In this case x1 and y1 are decision variables, so d[x1 - v[1,w],y1 - v[2,w]] is not allowed. You'll need to reformulate the problem in a way that avoids this issue.
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
add a comment |
As the error message says, you can't use decision variables within a subscript in AMPL. In this case x1 and y1 are decision variables, so d[x1 - v[1,w],y1 - v[2,w]] is not allowed. You'll need to reformulate the problem in a way that avoids this issue.
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
add a comment |
As the error message says, you can't use decision variables within a subscript in AMPL. In this case x1 and y1 are decision variables, so d[x1 - v[1,w],y1 - v[2,w]] is not allowed. You'll need to reformulate the problem in a way that avoids this issue.
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
As the error message says, you can't use decision variables within a subscript in AMPL. In this case x1 and y1 are decision variables, so d[x1 - v[1,w],y1 - v[2,w]] is not allowed. You'll need to reformulate the problem in a way that avoids this issue.
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
answered Nov 29 '18 at 0:29
Geoffrey BrentGeoffrey Brent
91588
91588
add a comment |
add a comment |
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What solver are you expecting to use?
– Geoffrey Brent
Nov 28 '18 at 1:24