bitget

Get bit at specified position

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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

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Open Script

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.

Open Script

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

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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

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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.

See Also

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Introduced before R2006a

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