rand
Uniformly distributed random numbers
Syntax
Description
X = rand
returns a random scalar drawn from the uniform
distribution in the interval (0,1).
X = rand(
returns
an sz1,...,szN
)sz1
-by-...-by-szN
array of
random numbers where sz1,...,szN
indicate the size
of each dimension. For example, rand(3,4)
returns
a 3-by-4 matrix.
X = rand(___,
returns an
array of random numbers of data type typename
)typename
. The
typename
input can be either "single"
or
"double"
. You can use any of the input arguments in the previous
syntaxes.
X = rand(
generates
numbers from random number stream s
,___)s
instead of the default global
stream. To create a stream, use RandStream
. You can specify s
followed by any
of the input argument combinations in previous syntaxes.
Examples
Input Arguments
Tips
The sequence of numbers produced by
rand
is determined by the internal settings of the uniform pseudorandom number generator that underliesrand
,randi
, andrandn
. You can control that shared random number generator usingrng
.
Extended Capabilities
Version History
Introduced before R2006aSee Also
randi
| randn
| rng
| RandStream
| sprand
| sprandn
| randperm
Topics
- Create Arrays of Random Numbers
- Generate Random Numbers That Are Repeatable
- Generate Random Numbers That Are Different
- Random Numbers Within a Specific Range
- Random Numbers Within a Sphere
- Creating and Controlling a Random Number Stream
- Class Support for Array-Creation Functions
- Replace Discouraged Syntaxes of rand and randn
- Why Do Random Numbers Repeat After Startup?