Package edu.cmu.tetrad.calculator.expression

Interface Expression

All Superinterfaces:

Serializable, TetradSerializable

All Known Implementing Classes:

ConstantExpression, EvaluationExpression, VariableExpression

public interface Expression
extends TetradSerializable

Represents a mathematical expression. Used in the Calculator and the Generalized Sem model.

Note that expressions form trees. Each expression has a (possibly empty) list of children.

Author:

Tyler Gibson

Field Summary

Fields

Modifier and Type	Field	Description
static final long	serialVersionUID

Method Summary

Modifier and Type	Method	Description
double	evaluate(Context context)	Evaluates the expression using the given context
List<Expression>	getExpressions()
org.apache.commons.math3.distribution.IntegerDistribution	getIntegerDistribution(Context context)
ExpressionDescriptor.Position	getPosition()
org.apache.commons.math3.distribution.RealDistribution	getRealDistribution(Context context)
String	getToken()

Field Details

serialVersionUID

static final long serialVersionUID

See Also:

• Constant Field Values

Method Details

evaluate

double evaluate(Context context)

Evaluates the expression using the given context

getToken

String getToken()

Returns:

the token for this expression=="+".

getPosition

ExpressionDescriptor.Position getPosition()

Returns:

the position, infix or not.

getExpressions

List<Expression> getExpressions()

Returns:

the sub expressions of this expression.

getRealDistribution

org.apache.commons.math3.distribution.RealDistribution getRealDistribution(Context context)

getIntegerDistribution

org.apache.commons.math3.distribution.IntegerDistribution getIntegerDistribution(Context context)