nnz

Number of nonzero elements in fi object

Since R2020b

Syntax

N = nnz(X)

Description

N = nnz(X) returns the number of nonzero elements in X.

When X is a built-in MATLAB^® type, floating-point fi object, or scaled double fi object, N is returned as a double. When X is a fixed-point fi object, N is returned as a uint32 if X has fewer than 2³² elements. Otherwise, N is returned as a uint64.

Examples

Number of Nonzero Elements in fi Object

Create a fi object and determine the number of nonzero elements it contains.

p = fi([],1,24,12);
X = eye(2,3,'like',p)

X = 

     1     0     0
     0     1     0

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 24
        FractionLength: 12

N = nnz(X)

N =

  uint32

   2

Input Arguments

X — Input array

scalar | vector | matrix | multidimensional array

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

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | logical | fi
Complex Number Support: Yes

Extended Capabilities

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

Version History

Introduced in R2020b