Expression class abstract

An abstract representation of a mathematical expression.

The Expression class provides a framework for representing, evaluating, differentiating, and integrating mathematical expressions. Each specific type of expression (e.g., polynomial, symbolic, function) should extend this class and provide concrete implementations of the required methods.

Implementers

Available extensions

ExpressionExtension

Constructors

Expression()

Properties

hashCode → int: The hash code for this object.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

depth() → int: Calculate the depth of the expression tree.
differentiate([Variable? v]) → Expression: Differentiates the expression with respect to a variable.
evaluate([dynamic arg]) → dynamic: Evaluates the expression for a given value of x.
expand() → Expression: Expands the expression, if applicable, and returns a new expanded expression.
getVariables() → Set<Variable>: Retrieves the base variables present in the expression, effectively decomposing composite variables into their constituent parts. For instance, for an expression containing x^2, it returns x, and for x*y, it returns both x and y.
getVariableTerms() → Set<Variable>: Retrieves all variables present in the expression, including composite variables like x^2 or x*y.
integrate() → Expression: Integrates the expression with respect to a variable.
isIndeterminate(dynamic x) → bool
isInfinity(dynamic x) → bool
isPoly([bool strict = false]) → bool: Checks if the expression is a polynomial.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
simplify() → Expression: Simplifies the expression, if possible, and returns a new simplified expression.
simplifyBasic() → Expression: Performs basic simplification (arithmetic, combining like terms).
size() → int: Compute the size of the expression based on the number of nodes in its tree.
substitute(Expression oldExpr, Expression newExpr) → Expression: Replace a sub-expression or a variable with another expression.
toString() → String: Returns the string representation of the expression.
override

Operators

operator %(dynamic other) → Expression: Modulo operator. Creates a Modulo expression.
operator *(dynamic other) → Expression: Multiply operator. Creates a Multiply expression.
operator +(dynamic other) → Expression: Add operator. Creates an Add expression.
operator -(dynamic other) → Expression: Subtract operator. Creates a Subtract expression.
operator /(dynamic other) → Expression: Divide operator. Creates a Divide expression.
operator ==(Object other) → bool: The equality operator.
inherited
operator ^(dynamic other) → Expression: Power operator. Creates a Pow expression.
operator unary-() → Expression: Unary minus operator. Creates a Negate expression.

Static Methods

parse(String formattedString) → Expression
tryParse(String formattedString) → Expression?