Gain

Library

Linear

Description

This block is a gain block. The output is the Gain times the regular input (vector). The dimensions of Gain determines the input (number of columns) and output (number of rows) port sizes.

Dialog Box

Set gain block parameters
Gain	1

• Gain: a real matrix.

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: gainblk

Interfacing function

scilab/macros/scicos_blocks/linear/GAINBLK.sci

Computational function (type 4)

#include "scicos_block.h"
#include <math.h>
#include "../machine.h"
extern void C2F(dmmul)();

void gainblk(scicos_block *block,int flag)
{
  int i,un=1;
  if (block->nrpar==1){
    for (i=0;i<block->insz[0];++i){
      block->outptr[0][i]=block->rpar[0]*block->inptr[0][i];
    }
  }else{
    C2F(dmmul)(block->rpar,&block->outsz[0],block->inptr[0],
	       &block->insz[0],block->outptr[0],&block->outsz[0],
	       &block->outsz[0],&block->insz[0],&un);
  }
}