BIGSOM_f

Block Screenshot

Contents

• Sum

• • Palette

  • Description

  • Dialog box

  • Default properties

  • Interfacing function

  • Computational function

  • Example

  • See also

Palette

• Math operations palette

Description

This block performs addition or soustraction on its scalar or vector inputs.The user can adjust the gain for each input with the parameter Inputs ports signs/gain. The behavior of the block is summarized in the following table :

Number of inputs	Operation	Remarks
One	y = k*u	k is the scalar value in Inputs ports signs/gain parameter. The block has the behavior of a gain.
Two or more	y = k[1]*u1+k[2]*u2+...+k[n]*uN	k is the vector value write in Inputs ports signs/gain parameter. To subtract an input ui, set a negative value in k[i].

Dialog box

• Inputs ports signs/gain

  Set sign and a gain for each inputs.

  Properties : Type 'vec' of size -1.

Default properties

• always active: no

• direct-feedthrough: yes

• zero-crossing: no

• mode: no

• regular inputs:

  - port 1 : size [-1,1] / type 1

  - port 2 : 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: sum

Interfacing function

• SCI/modules/scicos_blocks/macros/Linear/BIGSOM_f.sci

Computational function

• SCI/modules/scicos_blocks/src/c/sum.c (Type 2)

Example

See also

• SUMMATION - Matrix Addition/Subtraction (Xcos block)

• SUM_f - Summation (Xcos block)