Documentation

This is machine translation

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

bitget

Get bit at specified position

Syntax

Description

example

b = bitget(A,bit) returns the bit value at position bit in integer array A.

example

b = bitget(A,bit,assumedtype) assumes that A is of assumedtype.

Examples

collapse all

Find the difference in the binary representation between the maximum integer of signed and unsigned integers.

a1 = intmax('int8');
a2 = intmax('uint8');
b1 = bitget(a1,8:-1:1)
b2 = bitget(a2,8:-1:1)
b1 =

  1×8 int8 row vector

   0   1   1   1   1   1   1   1


b2 =

  1×8 uint8 row vector

   1   1   1   1   1   1   1   1

The signed integers require a bit to accommodate negative integers.

Find the 8-bit representation of a negative number.

A = -29;
b = bitget(A,8:-1:1,'int8')
b =

     1     1     1     0     0     0     1     1

Input Arguments

collapse all

Input values, specified as an array. A can be a scalar or an array of the same size as bit.

  • If A is a double array, and assumedtype is not specified, then MATLAB® treats A as an unsigned 64-bit integer.

  • If assumedtype is specified, then all elements in A must have integer values within the range of assumedtype.

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

Bit position, specified as an integer or integer array. bit can be a scalar or an array of the same size as A. bit must be between 1 (the least-significant bit) and the number of bits in the integer class of A.

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

Assumed data type of A, specified as 'uint64', 'uint32', 'uint16', 'uint8', 'int64', 'int32', 'int16', or 'int8'.

  • If A is a double array, then assumedtype can specify any valid integer type, but defaults to 'uint64'.

  • If A is an integer type array, then assumedtype must specify that same integer type.

Data Types: char

Output Arguments

collapse all

Bit value at bit, returned as an array of 0s and 1s. b is the same data type as A.

  • If A and bit are scalars, then b is also a scalar.

  • If either A or bit is an array, then b is the same size as that array.

Introduced before R2006a

Was this topic helpful?