运算符和初等运算

对符号对象执行算术、关系和逻辑运算

Symbolic Math Toolbox™ 包括对符号对象执行算术、关系和逻辑运算以及模数和复数运算的函数。您可以使用这些函数执行简单运算（例如，加法、乘法和计算指数）以及其他运算（例如求 n 次方根、模数以及求除法的商和余数）。

函数

算术运算

`minus`	Symbolic subtraction
`plus`	Symbolic addition
`times`	Symbolic array multiplication
`ldivide`	符号数组左除
`rdivide`	符号数组右除
`power`	Symbolic array power
`nthroot`	Nth root of symbolic numbers
`mtimes`	Symbolic matrix multiplication
`mldivide`	Symbolic matrix left division
`mrdivide`	Symbolic matrix right division
`mpower`	Symbolic matrix power
`transpose`	Symbolic matrix transpose
`ctranspose`	Symbolic matrix complex conjugate transpose

关系运算

运算符

`eq`	Define symbolic equation
`ge`	Define greater than or equal to condition
`gt`	Define greater than relation
`le`	Define less than or equal to condition
`lt`	Define less than relation
`ne`	Define inequality

函数

`has`	Check if expression contains particular subexpression
`hasSymType`	Determine whether symbolic object contains specific type
`in`	Numeric type of symbolic input
`isAlways`	Determine if symbolic conditions are true for all values of variables
`isequal`	Determine if symbolic inputs are equal
`isequaln`	Test symbolic objects for equality, treating `NaN` values as equal
`isSymType`	Determine whether symbolic object is specific type
`max`	Maximum elements of symbolic input (自 R2021a 起)
`min`	Minimum elements of symbolic input (自 R2021a 起)
`piecewise`	Conditionally defined expression or function

逻辑运算

运算符

`and`	Logical AND for symbolic expressions
`not`	Logical NOT for symbolic expressions
`or`	Logical OR for symbolic expressions
`xor`	Logical XOR for symbolic expressions

函数

`all`	Test whether all equations and inequalities represented as elements of symbolic array are valid
`any`	Test whether at least one of equations and inequalities represented as elements of symbolic array is valid
`has`	Check if expression contains particular subexpression
`hasSymType`	Determine whether symbolic object contains specific type
`in`	Numeric type of symbolic input
`isAlways`	Determine if symbolic conditions are true for all values of variables
`isequaln`	Test symbolic objects for equality, treating `NaN` values as equal
`isfinite`	Check whether symbolic array elements are finite
`isinf`	Check whether symbolic array elements are infinite
`isnan`	Check whether symbolic array elements are `NaN`s
`isSymType`	Determine whether symbolic object is specific type
`logical`	Determine if symbolic equation, inequality, or condition is true
`symtrue`	Symbolic logical constant true
`symfalse`	Symbolic logical constant false

模数运算

`mod`	Symbolic modulus after division
`powermod`	Modular exponentiation
`quorem`	Quotient and remainder
`rem`	Remainder after division

复数

`abs`	Symbolic absolute value (complex modulus or magnitude)
`angle`	Symbolic polar angle
`conj`	Complex conjugate of symbolic input
`imag`	Imaginary part of complex number
`real`	Real part of complex number

主题

Check Symbolic Equations, Inequalities, and Conditional Statements
Determine if symbolic equations, inequalities, and conditional statements are true.
Linear Algebraic Operations
Perform linear algebra with symbolic expressions and functions.