MATMUL

Scicos Block
fr - eng

##
MATMUL Matrix Multiplication

### Contents

- MATMUL Matrix Multiplication
  - Palette
  - Description
  - Dialog box
  - Example
  - Default properties
  - Interfacing function
  - Computational function
  - See also
  - Authors

### Palette

- Matrix - Matrix operation palette

### Description

The MATMUL block computes the matrix multiplication of two inputs matrices.The number of rows of the second matrix must be equal to the number of columns of the first matrix. The output is a matrix where the number of rows is equal to that of the first input matrix and the number of columns is equal to that of the second input matrix.

### 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 Scicos will print the message "Datatype is not supported".
  Properties : Type 'vec' of size 1.

- Multiplication rule (1= * 2= .* )
  ?
  Properties : Type 'vec' of size 1.

### Example

    A=[1 2 3;4 5 6]
    B=[9 8 7 6;5 4 3 2;9 7 5 3]
    y=[46 37 28 19;115 94 73 52]

### Default properties

- always active: no
- direct-feedthrough: yes
- zero-crossing: no
- mode: no
- regular inputs:
  - port 1 : size [-1,-2] / type 1
  - port 2 : size [-2,-3] / type 1
- regular outputs:
  - port 1 : size [-1,-3] / 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: matmul_m

### Interfacing function

- SCI/macros/scicos_blocks/MatrixOp/MATMUL.sci [view code]

### Computational function

- SCI/routines/scicos/matmul_m.c [view code]
- SCI/routines/scicos/matzmul_m.c [view code]
- SCI/routines/scicos/matmul2_m.c [view code]
- SCI/routines/scicos/matzmul2_m.c [view code]

### See also

- INTMUL - INTMUL integer matrix multiplication (Scicos Block)
- MATDIV - MATDIV Matrix division (Scicos Block)
- MATBKSL - MATBKSL:left matrix division (Scicos Block)
- MATEXPM - MATEXPM Matrix Exponential (Scicos Block)
- SUMMATION - SUMMATION Matrix Summation (Scicos Block)

### Authors

- Fady NASSIF INRIA
- Alan Layec INRIA