类

This page lists all the various class types in Math.js. Every top-level function is listed here and links to its detailed reference to other parts of the documentation.

### math
The “math” namespace contains the entire math.js functionality. All of the mathematical functions are available in the “math” namespace, and allow for inputs of various types.

- [Function reference](http://www.bixiaguangnian.com/manual/mathjs/382.html "Function reference")
- [Constant reference](http://www.bixiaguangnian.com/manual/mathjs/383.html "Constant reference")

### Unit
Stores values for a scalar unit and its postfix. (eg 100 mm or 100 kg). Although the Unit class contains public functions documented as follows, using the following API directly is not recommended. Prefer using the functions in the “math” namespace wherever possible.

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/379.html "Overview")
- [Class API](https://github.com/rawify/Fraction.js "Class API")

### Fraction
Stores values for a fractional number.

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/376.html "Overview")
- [Class API](https://github.com/rawify/Fraction.js "Class API")

### BigNumber
Stores values for a arbitrary-precision floating point number.

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/375.html "Overview")
- [Class API](https://mikemcl.github.io/decimal.js/ "Class API")

### Matrix
Two types of matrix classes are available in math.js, for storage of dense and sparse matrices. Although they contain public functions documented as follows, using the following API directly is not recommended. Prefer using the functions in the “math” namespace wherever possible.

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/378.html "Overview")
- DenseMatrix
- SparseMatrix

Classes used internally that may be of use to developers:

- Index
- Range
- ResultSet
- FibonacciHeap

### Complex
Stores values for a complex number.

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/377.html "Overview")
- [Class API](https://github.com/infusion/Complex.js/ "Class API")

### Parser
The Parser object returned by math.parser().

- [Overview](http://www.bixiaguangnian.com/manual/mathjs/367.html "Overview")

### Node
A node in an expression-tree, which can be used to analyze, manipulate, and evaluate expressions.

- Overview

`Node` is the base class of all other node classes:

- [AccessorNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#AccessorNode "AccessorNode")
- [ArrayNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#ArrayNode "ArrayNode")
- [AssignmentNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#AssignmentNode "AssignmentNode")
- [BlockNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#BlockNode "BlockNode")
- [ConditionalNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#ConditionalNode "ConditionalNode")
- [ConstantNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#ConstantNode "ConstantNode")
- [FunctionAssignmentNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#FunctionAssignmentNode "FunctionAssignmentNode")
- [FunctionNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#FunctionNode "FunctionNode")
- [IndexNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#IndexNode "IndexNode")
- [ObjectNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#ObjectNode "ObjectNode")
- [OperatorNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#OperatorNode "OperatorNode")
- [ParenthesisNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#ParenthesisNode "ParenthesisNode")
- [RangeNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#RangeNode "RangeNode")
- [SymbolNode](http://www.bixiaguangnian.com/manual/mathjs/369.html#SymbolNode "SymbolNode")