zeros

Create array of all zeros

Syntax

  • X = zeros(classname)
  • X = zeros(n,classname)
  • X = zeros(sz1,...,szN,classname) example
  • X = zeros(sz,classname)
  • X = zeros('like',p) example
  • X = zeros(n,'like',p)
  • X = zeros(sz1,...,szN,'like',p) example
  • X = zeros(sz,'like',p) example

Description

X = zeros returns the scalar 0.

example

X = zeros(n) returns an n-by-n matrix of zeros.

example

X = zeros(sz1,...,szN) returns an sz1-by-...-by-szN array of zeros where sz1,...,szN indicates the size of each dimension. For example, zeros(2,3) returns a 2-by-3 array of zeros.

example

X = zeros(sz) returns an array of zeros where size vector sz defines size(X). For example, zeros([2,3]) returns a 2-by-3 array of zeros.

X = zeros(classname) returns the scalar 0, where classname specifies the data type. For example, zeros('int8') returns the scalar, 8-bit integer 0.

X = zeros(n,classname) returns an n-by-n array of zeros of data type classname.

example

X = zeros(sz1,...,szN,classname) returns an sz1-by-...-by-szN array of zeros of data type classname.

X = zeros(sz,classname) returns an array of zeros where size vector sz defines size(X) and classname defines class(X).

example

X = zeros('like',p) returns the scalar 0 like p; that is, with the same data type (class), sparsity, and complexity (real or complex).

X = zeros(n,'like',p) returns an n-by-n array of zeros like p.

example

X = zeros(sz1,...,szN,'like',p) returns an sz1-by-...-by-szN array of zeros like p.

example

X = zeros(sz,'like',p) returns an array of zeros like p where size vector sz defines size(X).

Examples

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Square Matrix of Zeros

Create a 4-by-4 matrix of zeros.

X = zeros(4)
X =

     0     0     0     0
     0     0     0     0
     0     0     0     0
     0     0     0     0

3-D Array of Zeros

Create a 2-by-3-by-4 array of zeros.

X = zeros(2,3,4);
size(X)
ans =

     2     3     4

Clone Size from Existing Array

Create an array of zeros that is the same size as an existing array.

A = [1 4; 2 5; 3 6];
sz = size(A);
X = zeros(sz)
X =

     0     0
     0     0
     0     0

It is a common pattern to combine the previous two lines of code into a single line:

X = zeros(size(A));

Specify Data Type of Zeros

Create a 1-by-3 vector of zeros whose elements are 32-bit unsigned integers.

X = zeros(1,3,'uint32')
X =

           0           0           0
class(X)
ans =

uint32

Clone Complexity from Existing Array

Create a scalar 0 that is complex like an existing array instead of real valued.

First, create a complex vector.

p = [1+2i 3i];

Create a scalar 0 that is complex like p.

X = zeros('like',p)
X =

   0.0000 + 0.0000i

Clone Sparsity from Existing Array

Create a 10-by-10 sparse matrix.

p = sparse(10,10,pi);

Create a 2-by-3 matrix of zeros that is sparse like p.

X = zeros(2,3,'like',p)
X =

   All zero sparse: 2-by-3

Clone Size and Data Type from Existing Array

Create a 2-by-3 array of 8-bit unsigned integers.

p = uint8([1 3 5 ; 2 4 6]);

Create an array of zeros that is the same size and data type as p.

X = zeros(size(p),'like',p)
X =

    0    0    0
    0    0    0
class(X)
ans =

uint8

Input Arguments

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n — Size of square matrixinteger value

Size of square matrix, specified as an integer value.

  • If n is 0, then X is an empty matrix.

  • If n is negative, then it is treated as 0.

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

sz1,...,szN — Size of each dimension (as separate arguments)integer values

Size of each dimension, specified as separate arguments of integer values.

  • If the size of any dimension is 0, then X is an empty array.

  • If the size of any dimension is negative, then it is treated as 0.

  • Beyond the second dimension, zeros ignores trailing dimensions with a size of 1. For example, zeros([3,1,1,1]) produces a 3-by-1 vector of zeros.

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

sz — Size of each dimension (as a row vector)integer values

Size of each dimension, specified as a row vector of integer values. Each element of this vector indicates the size of the corresponding dimension:

  • If the size of any dimension is 0, then X is an empty array.

  • If the size of any dimension is negative, then it is treated as 0.

  • Beyond the second dimension, zeros ignores trailing dimensions with a size of 1. For example, zeros([3,1,1,1]) produces a 3-by-1 vector of zeros.

Example: sz = [2,3,4] defines X as a 2-by-3-by-4 array.

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

classname — Data type (class) to create'double' (default) | 'single' | 'int8' | 'uint8' | ...

Data type (class) to create, specified as the string 'double', 'single', 'int8', 'uint8', 'int16', 'uint16', 'int32', 'uint32', 'int64', 'uint64', or the name of another class that provides zeros support.

Data Types: char

p — Prototype of array to createnumeric array

Prototype of array to create, specified as a numeric array.

Data Types: double | single | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64
Complex Number Support: Yes

See Also

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