c = bitorreduce(a) performs
a bitwise OR operation on the entire set of bits
in the fixed-point input, a, and returns the result
as an unsigned integer of word length 1.

c = bitorreduce(a, lidx) performs
a bitwise OR operation on a consecutive range of
bits, starting at position lidx and ending at the
LSB (the bit at position 1).

Perform a bitwise OR operation on the bits of each element of a, starting at position fi(4).

c=bitorreduce(a,fi(4))

c =
1 1 1 1
DataTypeMode: Fixed-point: binary point scaling
Signedness: Unsigned
WordLength: 1
FractionLength: 0

All of the entries of output c have a value of 1 because all of the entries of a have at least one bit with a value of 1 between the positions fi(4) and 1.

Perform Bitwise OR Operation on a Range of Bits in a Matrix

There is only one element in output c that does not have a value of 1. This condition occurs because the corresponding element in a is the only element of a that does not have any bits with a value of 1 between positions 5 and 2.

Input array, specified as a scalar, vector, matrix, or multidimensional
array of fixed-point fi objects.

bitorreduce supports both signed and unsigned
inputs with arbitrary scaling. The sign and scaling properties do
not affect the result type and value. bitorreduce performs
the operation on a two's complement bit representation of the stored
integer.

Data Types: fixed-point fi

lidx — Start position of range scalar

Start position of range specified as a scalar of built-in type. lidx represents
the position in the range closest to the MSB.

You can also select a web site from the following list:

How to Get Best Site Performance

Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.