AI-generated Key Takeaways
-
A
LinearOptimizationConstraintobject represents a linear constraint of the formlowerBound ≤ Sum(a(i) x(i)) ≤ upperBound. -
The
setCoefficientmethod is used to set the coefficient of a variable within a constraint. -
By default, variables in a constraint have a coefficient of 0.
-
The provided example demonstrates how to create a variable and a constraint and then set the coefficient of the variable within that constraint.
Object storing a linear constraint of the form lower
where lower
and upper
are constants, a(i)
are constant
coefficients and x(i)
are variables (unknowns).
The example below creates one variable x
with values between 0
and 5
and creates the constraint 0 ≤ 2 * x ≤ 5
. This is done by first creating a constraint
with the lower bound 5
and upper bound 5
. Then the coefficient for variable x
in this constraint is set to 2
.
const engine = LinearOptimizationService . createEngine (); // Create a variable so we can add it to the constraint engine . addVariable ( 'x' , 0 , 5 ); // Create a linear constraint with the bounds 0 and 10 const constraint = engine . addConstraint ( 0 , 10 ); // Set the coefficient of the variable in the constraint. The constraint is now: // 0 <= 2 * x <= 5 constraint . setCoefficient ( 'x' , 2 );
Methods
| Method | Return type | Brief description |
|---|---|---|
Linear
|
Sets the coefficient of a variable in the constraint. |
Detailed documentation
set
Sets the coefficient of a variable in the constraint. By default, variables have a coefficient of 0.
const engine = LinearOptimizationService . createEngine (); // Create a linear constraint with the bounds 0 and 10 const constraint = engine . addConstraint ( 0 , 10 ); // Create a variable so we can add it to the constraint engine . addVariable ( 'x' , 0 , 5 ); // Set the coefficient of the variable in the constraint. The constraint is now: // 0 <= 2 * x <= 5 constraint . setCoefficient ( 'x' , 2 );
Parameters
| Name | Type | Description |
|---|---|---|
variable
|
String
|
the name of variable for which the coefficient is being set |
coefficient
|
Number
|
coefficient being set |
Return
Linear
— this linear optimization constraint
