Extractor

Library

Branching

Description

It extracts values from an input vector. For example if the input is of size 4 and we qre interested only in the 3rd and first components (in that order), block parameter should be set to 3 1.

Dialog Box

Set block parameters
indices to extract	1

• indices to extract: vector indicating the components to be extracted.

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• number/sizes of inputs: 1 / -1
• number/sizes of outputs: 1 / 1
• number/sizes of activation inputs: 0 /
• number/sizes of activation outputs: 0 /
• continuous-time state: no
• discrete-time state: no
• name of computational function: extractor

Interfacing function

scilab/macros/scicos_blocks/branching/EXTRACTOR.sci

Computational function (type 4)

#include "scicos_block.h"
#include <math.h>

void extractor(scicos_block *block,int flag)
{
  int i,j;
  if(flag==1){
    for(i=0;i<block->nipar;++i){
      j=block->ipar[i]-1;
      if(j<0) j=0;
      if(j>=block->insz[0]) j=block->insz[0]-1;
      block->outptr[0][i]=block->inptr[0][j];
    }
  }
}