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## Commenting |

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## Examples | ||||||||

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< < | The Whiskas Cat Food Problem # The set of all possible ingredients for the cat food set INGREDIENTS; | |||||||

> > | The Whiskas Cat Food Problem
# The set of all possible ingredients for the cat food set INGREDIENTS; | |||||||

The Surfboard Production Problem | ||||||||

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> > | ||||||||

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< < | param Resin {SURFBOARDS} >= 0; # Amount of resin (in kilos) needed for a board param TotalResin >= 0; # Total amount of resin available | |||||||

> > | param Supply {MATERIALS}; # The supply of each raw material
param Recipe {MATERIALS, SURFBOARDS}; # The "recipe" for making surfboards | |||||||

## Using =symbolic |

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<-- Ready to Review - done - Lauren--> ## The AMPL Syntax Guide | ||||||||

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- Looping Statements Fix this link - Lauren
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> > | - Logical Statements Coming soon!
- Looping Statements
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< < | - Miscellaneous AMPL Commands Fix this link - Lauren
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## Commenting |

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- Displaying and Printing
- Miscellaneous AMPL Commands Fix this link - Lauren
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< < | ## Commenting Fix stacking on this page - Lauren | |||||||

> > | ## Commenting | |||||||

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The Whiskas Cat Food Problem # The set of all possible ingredients for the cat food set INGREDIENTS; | ||||||||

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< < | param Resin {SURFBOARDS} >= 0; # Amount of resin (in kilos) needed for a board param TotalResin >= 0; # Total amount of resin available | |||||||

> > | param Resin {SURFBOARDS} >= 0; # Amount of resin (in kilos) needed for a board param TotalResin >= 0; # Total amount of resin available | |||||||

## Using =symbolic
The
## Example. Searching a 1-Dimensional set | ||||||||

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< < | param gotcha symbolic within SET; for {s in SET} { if then let gotcha := s; } # gotcha now contains the (last) element in SET that satisfies the condition | |||||||

> > | param gotcha symbolic within SET; for {s in SET} { if then let gotcha := s; } # gotcha now contains the (last) element in SET that satisfies the condition | |||||||

## Example. Searching a 2-Dimensional Set | ||||||||

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< < | set SET1; set SET2; set TWO_D_SET within SET1 cross SET2; param got_one symbolic within SET1; param got_two symbolic within SET2; for {(s, t) in TWO_D_SET} { if then { let got_one := s; let got_two := t; } } # (got_one, got_two) now contains the (last) element in TWO_D_SET # that satisfies the condition | |||||||

> > | set SET1; set SET2; set TWO_D_SET within SET1 cross SET2; param got_one symbolic within SET1; param got_two symbolic within SET2; for {(s, t) in TWO_D_SET} { if then { let got_one := s; let got_two := t; } } # (got_one, got_two) now contains the (last) element in TWO_D_SET # that satisfies the condition | |||||||

To build labels for set elements you need a `symbolic` parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within `(` and `)` and joining the parts with `&` . The parts can be set elements, strings or numbers. Numbers are converted to strings using the %g format from printf . | ||||||||

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> > | ||||||||

## Example. Dynamically Building a Set | ||||||||

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< < | param name symbolic; let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } | |||||||

> > | param name symbolic; let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } | |||||||

-- MichaelOSullivan - 27 Feb 2008 |

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< < | <-- Ready to Review --> | |||||||

> > | <-- Ready to Review - done - Lauren--> | |||||||

## The AMPL Syntax Guide
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> > | - Logical Statements Fix this link - Lauren
- Looping Statements Fix this link - Lauren
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< < | ||||||||

> > | - Miscellaneous AMPL Commands Fix this link - Lauren
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< < | ## Commenting | |||||||

> > | ## Commenting Fix stacking on this page - Lauren | |||||||

The `#` is used for commenting, any characters on a line after the `#` are ignored by AMPL.
## Examples | ||||||||

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< < | The Whiskas Cat Food Problem
# The set of all possible ingredients for the cat food set INGREDIENTS; The Surfboard Production Problem | |||||||

> > | The Whiskas Cat Food Problem # The set of all possible ingredients for the cat food set INGREDIENTS; The Surfboard Production Problem | |||||||

## Using =symbolic
The
## Example. Searching a 1-Dimensional set | ||||||||

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< < | param gotcha symbolic within SET; for {s in SET} { if | |||||||

> > | ||||||||

## Example. Searching a 2-Dimensional Set | ||||||||

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< < | set SET1; set SET2; set TWO_D_SET within SET1 cross SET2; param got_one symbolic within SET1; param got_two symbolic within SET2; for {(s, t) in TWO_D_SET} { if | |||||||

> > | ||||||||

Changed: | ||||||||

< < | To build labels for set elements you need a `symbolic` parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within `(` and `)` and joining the parts with `&` . The parts can be set elements, strings or numbers. Numbers are converted to strings using the %g format from printf
. | |||||||

> > | To build labels for set elements you need a `symbolic` parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within `(` and `)` and joining the parts with `&` . The parts can be set elements, strings or numbers. Numbers are converted to strings using the %g format from printf . | |||||||

## Example. Dynamically Building a Set | ||||||||

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< < | param name symbolic; let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } | |||||||

> > | ||||||||

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> > | <-- Ready to Review --> | |||||||

## The AMPL Syntax Guide | ||||||||

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< < | Disclaimer This is a to the AMPL syntax only. For a comprehensive reference to the AMPL language see AMPL: A Modeling Language for Mathematical Programming.guide | |||||||

> > | Disclaimer This is a to the AMPL syntax only. For a comprehensive reference to the AMPL language see AMPL: A Modeling Language for Mathematical Programming.guide | |||||||

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## Commenting | ||||||||

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The `#` is used for commenting, any characters on a line after the `#` are ignored by AMPL.
## Examples | ||||||||

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< < | The Whiskas Cat Food Problem # The set of all possible ingredients for the cat food set INGREDIENTS;The Surfboard Production Problem | |||||||

> > | The Whiskas Cat Food Problem
# The set of all possible ingredients for the cat food set INGREDIENTS; The Surfboard Production Problem | |||||||

## Using =symbolic
The
## Example. Searching a 1-Dimensional set | ||||||||

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< < | | |||||||

> > |
| |||||||

## Example. Searching a 2-Dimensional Set | ||||||||

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< < | | |||||||

> > |
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< < | To build labels for set elements you need a `symbolic` parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within `(` and `)` and joining the parts with `&` . The parts can be set elements, strings or numbers. Numbers are converted to strings using the =%g= format from =printf= . | |||||||

> > | To build labels for set elements you need a `symbolic` parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within `(` and `)` and joining the parts with `&` . The parts can be set elements, strings or numbers. Numbers are converted to strings using the %g format from printf
. | |||||||

## Example. Dynamically Building a Set | ||||||||

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< < | | |||||||

> > | param name symbolic; | |||||||

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< < | ## Sets in AMPL | |||||||

> > | let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } | |||||||

-- MichaelOSullivan - 27 Feb 2008 |

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## The AMPL Syntax Guide | ||||||||

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< < | Disclaimer This is a *guide* to the AMPL syntax only. For a comprehensive reference to the AMPL language see AMPL: A Modeling Language for Mathematical Programming. | |||||||

> > | Disclaimer This is a to the AMPL syntax only. For a comprehensive reference to the AMPL language see AMPL: A Modeling Language for Mathematical Programming.guide | |||||||

Changed: | ||||||||

< < | - Commenting
- Using {\tt symbolic}
- Sets
- Variables
- Parameters
- Expressions
- Objective Functions
- Constraints
- Logical Statements
- Looping Statements
- Displaying and Printing
- Miscellaneous AMPL Commands
## CommentingThe {\tt #} is used for commenting, any characters after the {\tt #} are ignored by AMPL.
## ExamplesThe Whiskas Cat Food Problem\begin{verbatim} var x1 >= 0; # Percentage chicken meat used in 100g of cat food (= g) \end{verbatim}
The Surfboard Production Problem \begin{verbatim} param Resin {SURFBOARDS} >= 0; # Amount of resin (in kilos) needed for a board param TotalResin >= 0; # Total amount of resin available \end{verbatim}
## Using {\tt symbolic}
The {\tt symbolic} keyword is used to create parameters that represent character strings. Usually they are used to represent members of 1-dimensional sets or part of a
## Example. Searching a 1-Dimensional set\begin{verbatim}
param gotcha symbolic within SET;
for {s in SET} {
if
## Example. Searching a 2-Dimensional Set\begin{verbatim} set SET1; set SET2; set TWO_D_SET within SET1 cross SET2; param got_one symbolic within SET1; param got_two symbolic within SET2;
for {(s, t) in TWO_D_SET} {
if
To build labels for set elements you need a {\tt symbolic} parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within {\tt (} and {\tt )} and joining the parts with {\tt &}. The parts can be set elements, strings or numbers. Numbers are converted to strings using the {\tt %g} format from {\tt printf}. ## Example. Dynamically Building a Set\begin{verbatim} param name symbolic; let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } \end{verbatim}
| |||||||

> > | ||||||||

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< < | Logical Statements | |||||||

> > | ## Commenting | |||||||

Changed: | ||||||||

< < | Looping Statements | |||||||

> > | The `#` is used for commenting, any characters on a line after the `#` are ignored by AMPL. | |||||||

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< < | Displaying and Printing | |||||||

> > | ## ExamplesThe Whiskas Cat Food Problem# The set of all possible ingredients for the cat food set INGREDIENTS;The Surfboard Production Problem | |||||||

Changed: | ||||||||

< < | Miscellaneous AMPL Commands | |||||||

> > | ## Using =symbolic
## Example. Searching a 1-Dimensional set
## Example. Searching a 2-Dimensional Set
To build labels for set elements you need a ## Example. Dynamically Building a Set
## Sets in AMPL | |||||||

-- MichaelOSullivan - 27 Feb 2008 |

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> > |
## The AMPL Syntax Guide
- Commenting
- Using {\tt symbolic}
- Sets
- Variables
- Parameters
- Expressions
- Objective Functions
- Constraints
- Logical Statements
- Looping Statements
- Displaying and Printing
- Miscellaneous AMPL Commands
## CommentingThe {\tt #} is used for commenting, any characters after the {\tt #} are ignored by AMPL.
## ExamplesThe Whiskas Cat Food Problem\begin{verbatim} var x1 >= 0; # Percentage chicken meat used in 100g of cat food (= g) \end{verbatim}
The Surfboard Production Problem \begin{verbatim} param Resin {SURFBOARDS} >= 0; # Amount of resin (in kilos) needed for a board param TotalResin >= 0; # Total amount of resin available \end{verbatim}
## Using {\tt symbolic}
The {\tt symbolic} keyword is used to create parameters that represent character strings. Usually they are used to represent members of 1-dimensional sets or part of a
## Example. Searching a 1-Dimensional set\begin{verbatim}
param gotcha symbolic within SET;
for {s in SET} {
if
## Example. Searching a 2-Dimensional Set\begin{verbatim} set SET1; set SET2; set TWO_D_SET within SET1 cross SET2; param got_one symbolic within SET1; param got_two symbolic within SET2;
for {(s, t) in TWO_D_SET} {
if
To build labels for set elements you need a {\tt symbolic} parameter and the parts of the label. You can then "glue" the parts of the label together by enclosing the label within {\tt (} and {\tt )} and joining the parts with {\tt &}. The parts can be set elements, strings or numbers. Numbers are converted to strings using the {\tt %g} format from {\tt printf}. ## Example. Dynamically Building a Set\begin{verbatim} param name symbolic; let SUPPLY_NODES := {}; for {s in SUPPLY_LOCATIONS} { let name := (s & '-Woodchips'); let SUPPLY_NODES := SUPPLY_NODES union {name}; let Supply[name] := MaterialSupply[s, 'Woodchips']; let {d in DEMAND_NODES} Cost[name, d] := TransportationCost[s, d]; let dummyDemandCost[name] := DisposalCost['Woodchips']; } \end{verbatim}
-- MichaelOSullivan - 27 Feb 2008 |

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