Extract Diagonal

Extract main diagonal of input matrix

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Libraries:
Simulink / Matrix Operations

Description

The Extract Diagonal block populates the unoriented output vector with the elements on the main diagonal of the M-by-N input matrix A. Equivalent MATLAB^® code is given by:

D = diag(A)		

Examples

Extract Diagonal of Matrix

Use the Extract Diagonal block to extract the diagonal of a matrix.

Open Model

Ports

Input

Port_1 — Input signal

scalar | vector | matrix

Input matrix to extract the diagonal from, specified as a scalar, vector, or matrix .

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point
Complex Number Support: Yes

Output

Port_1 — Output signal

vector

Output vector of each diagonal element.

The output is the same data type and complexity as the input. The output vector has length min(M,N).

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32 | Boolean | fixed point
Complex Number Support: Yes

Block Characteristics

Data Types	Boolean | double | fixed point | integer | single
Direct Feedthrough	no
Multidimensional Signals	no
Variable-Size Signals	no
Zero-Crossing Detection	no

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using Simulink® Coder™.

Generated code relies on the memcpy or memset function (string.h) under certain conditions.

Fixed-Point Conversion
Design and simulate fixed-point systems using Fixed-Point Designer™.

Version History

Introduced before R2006a

R2021b: Extract Diagonal Block Moved to Simulink Matrix Operations Library

The Extract Diagonal block has been moved from the DSP System Toolbox > Math Functions > Matrices and Linear Algebra > Matrix Operations library to the Simulink > Matrix Operationslibrary. All existing models continue to work.