MATDIAG¶

Create Diagonal Matrix

Block Screenshot¶

Contents¶

`Create Diagonal Matrix`_ +

Palette¶

Matrix operation palette

Description¶

The MATDIAG block create a diagonal matrix from a 1D vector. If the input is a Mx1 vector than the output is an MxM matrix.

The equivalent function of MATDIAG in Scilab is `diag(vm)`_ with vm a column vector.

Dialog box¶

Datatype (1=real double 2=Complex) It indicates the type of the output. It support only the two types double (1) and complex (2). If we input another entry in this label xcos will print the message “Datatype is not supported”. Properties : Type ‘vec’ of size 1.

Example¶

if the `input`_ of the block is U=ones(5,1) then the output is:
y=[1 0 0 0 0;0 1 0 0 0;0 0 1 0 0;0 0 0 1 0;0 0 0 0 1]

Default properties¶

always active: no
direct-feedthrough: yes
zero-crossing: no
mode: no
regular inputs: - port 1 : size [-1,1] / type 1
regular outputs: - port 1 : size [-1,-1] / type 1
number/sizes of activation inputs: 0
number/sizes of activation outputs: 0
continuous-time state: no
discrete-time state: no
object discrete-time state: no
name of computational function: mat_diag

Interfacing function¶

SCI/modules/scicos_blocks/macros/MatrixOp/MATDIAG.sci

Computational function¶

SCI/modules/scicos_blocks/src/c/mat_diag.c
SCI/modules/scicos_blocks/src/c/matz_diag.c

See also¶

Table Of Contents

MATDIAG

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