Scicos Block
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Random generator

Contents

• Random generator
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • Authors

Palette

• Sources - Sources palette

Description

This block is a random wave generator: each output component takes piecewise constant random values. Every time an event is received on the input event port, the outputs take new independent random values.
Output port size is given by the size of A and B matrices.

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.

• flag
  0 or 1.
  0 for uniform distribution on [A,A+B].
  1 for normal distribution.
  Properties : Type 'vec' of size 1.

• A
  matrix
  Properties : Type 'mat' of size [-1,-2].

• B
  matrix
  Properties : Type 'mat' of size [-1,-2].

• seed
  matrix
  Seed value for a sequence of random number.
  First number is for the real part and the second for the imaginary part.
  Properties : Type 'mat' of size [1,2].

Default properties

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

Interfacing function

• SCI/macros/scicos_blocks/Sources/RAND_m.sci [view code]

Computational function

• SCI/routines/scicos/rndblk_m.c [view code]
• SCI/routines/scicos/rndblkz_m.c [view code]

Authors

• Fady Nassif INRIA
• Ramine Nikoukhah INRIA