Documentation

This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.

uint8

8-bit unsigned integer arrays

Description

Variables in MATLAB® of data type (class) uint8 are stored as 1-byte (8-bit) unsigned integers. For example:

y = uint8(10);
whos y
  Name      Size            Bytes  Class    Attributes

  y         1x1                 1  uint8                  

For more information on integer types, see Integers.

Creation

Some array creation functions allow you to specify the data type. For instance, zeros(100,'uint8') creates a 100-by-100 matrix of zeros of type uint8.

If you have an array of a different type, such as double or single, then you can convert that array to an array of type uint8 by using the uint8 function.

Syntax

Y = uint8(X)

Description

example

Y = uint8(X) converts the values in X to type uint8. Values outside the range [0,28-1] map to the nearest endpoint.

Input Arguments

expand all

Input array, specified as a scalar, vector, matrix, or multidimensional array.

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

Examples

expand all

Convert a double-precision variable to an 8-bit unsigned integer.

x = 100;
xtype = class(x)
xtype = 
'double'
y = uint8(x)
y = uint8
    100

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Introduced before R2006a

Was this topic helpful?