算术运算

Addition, subtraction, multiplication, division, power, rounding

Arithmetic functions include operators for simple operations like addition and multiplication, as well as functions for common calculations like summation, moving sums, modulo operations, and rounding.

For more information, seeArray vs. Matrix Operations.

Functions

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Basic Arithmetic

Addition

`+`	Addition or append strings
`sum`	Sum of array elements
`cumsum`	Cumulative sum
`movsum`	Moving sum

Subtraction

`-`	Subtraction
`diff`	Differences and approximate derivatives

Multiplication

`.*`	Multiplication
`*`	Matrix multiplication
`prod`	Product of array elements
`cumprod`	Cumulative product
`pagemtimes`	Page-wise matrix multiplication

Division

`./`	Right array division
`.\`	Left array division
`/`	Solve systems of linear equationsxA = Bforx
`\`	Solve systems of linear equationsAx = Bforx

Powers

`.^`	Element-wise power
`^`	Matrix power

Transpose

`.'`	Transpose vector or matrix
`'`	Complex conjugate transpose
`pagetranspose`	Page-wise transpose
`pagectranspose`	Page-wise complex conjugate transpose

Array Sign

`uminus`	Unary minus
`uplus`	Unary plus

Modulo Division and Rounding

`mod`	Remainder after division (modulo operation)
`rem`	Remainder after division
`idivide`	Integer division with rounding option
`ceil`	Round toward positive infinity
`fix`	Round toward zero
`floor`	Round toward negative infinity
`round`	Round to nearest decimal or integer

Custom Binary Functions

bsxfun Apply element-wise operation to two arrays with implicit expansion enabled

Topics

Array vs. Matrix Operations

Matrix operations follow the rules of linear algebra, and array operations execute element by element operations and support multidimensional arrays. The period character (.) distinguishes the array operations from the matrix operations.

Compatible Array Sizes for Basic Operations

Most binary operators and functions in MATLAB^®support numeric arrays that have compatible sizes. Two inputs have compatible sizes if, for every dimension, the dimension sizes of the inputs are either the same or one of them is 1.

Operator Precedence

Precedence rules determine the order in which MATLAB evaluates an expression.

Floating-Point Numbers

MATLAB represents floating-point numbers in either double-precision or single-precision format. The default is double precision.

Integers

MATLAB supports 1-, 2-, 4-, and 8-byte storage for integer data. If you use the smallest integer type that accommodates your data, you can save memory and program execution time.