### 20 releases (3 stable)

1.5.0 | Jan 18, 2023 |
---|---|

1.2.2 | Aug 21, 2022 |

1.2.1 | Mar 23, 2022 |

0.6.1 | Feb 3, 2022 |

0.4.0 | Mar 19, 2021 |

#**460** in Math

**108** downloads per month

Used in good_lp

**MIT**license

37KB

646 lines

# highs

Safe rust bindings to the Highs MILP Solver. Best used from the **good_lp** linear
programming modeler.

## Usage examples

#### Building a problem variable by variable

`use` `highs``::``{`ColProblem`,` Sense`}``;`
`fn` `main``(``)`` ``{`
`let` `mut` pb `=` `ColProblem``::`new`(``)``;`
`//` We cannot use more then 5 units of sugar in total.
`let` sugar `=` pb`.``add_row``(``..``=``5``)``;`
`//` We cannot use more then 3 units of milk in total.
`let` milk `=` pb`.``add_row``(``..``=``3``)``;`
`//` We have a first cake that we can sell for 2€. Baking it requires 1 unit of milk and 2 of sugar.
pb`.``add_integer_column``(``2.``,` `0``..``,` `&``[``(`sugar`,` `2.``)``,` `(`milk`,` `1.``)``]``)``;`
`//` We have a second cake that we can sell for 8€. Baking it requires 2 units of milk and 3 of sugar.
pb`.``add_integer_column``(``8.``,` `0``..``,` `&``[``(`sugar`,` `3.``)``,` `(`milk`,` `2.``)``]``)``;`
`//` Find the maximal possible profit
`let` solution `=` pb`.``optimise``(``Sense``::`Maximise`)``.``solve``(``)``.``get_solution``(``)``;`
`//` The solution is to bake one cake of each sort
`assert_eq!``(`solution`.``columns``(``)``,` `vec!``[``1.``,` `1.``]``)``;`
`}`

#### Building a problem constraint by constraint

`use` `highs``::``*``;`
`fn` `main``(``)`` ``{`
`let` `mut` pb `=` `RowProblem``::`new`(``)``;`
`//` Optimize 3x - 2y with x<=6 and y>=5
`let` x `=` pb`.``add_column``(``3.``,` `..``6``)``;`
`let` y `=` pb`.``add_column``(``-``2.``,` `5``..``)``;`
pb`.``add_row``(``2``..``,` `&``[``(`x`,` `3.``)``,` `(`y`,` `8.``)``]``)``;` `//` 2 <= x*3 + y*8
`}`

#### Dependencies

~4.5–6MB

~125K SLoC