int8 - 8-bit signed integer arrays - MATLAB (original) (raw)

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8-bit signed integer arrays

Description

Variables in MATLAB® of data type (class) int8 are stored as 1-byte (8-bit) signed integers. For example:

Name Size Bytes Class Attributes

y 1x1 1 int8

For more information on integer types, see Integers.

Creation

Some array creation functions allow you to specify the data type. For instance,zeros(100,'int8') creates a 100-by-100 matrix of zeros of typeint8.

If you have an array of a different type, such as double orsingle, then you can convert that array to an array of typeint8 by using the int8 function.

Syntax

Description

Y = int8([X](#d126e898814)) converts the values inX to type int8. Values outside the range [-27,27-1] map to the nearest endpoint.

example

Input Arguments

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

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

Examples

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

x = 100; xtype = class(x)

Extended Capabilities

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Theint8 function fully supports tall arrays. For more information, see Tall Arrays.

The int8 function fully supports GPU arrays. To run the function on a GPU, specify the input data as a gpuArray (Parallel Computing Toolbox). For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).

Version History

Introduced before R2006a