Sum

Library

Linear

Description

Dialog Box

Set sum block parameters
Number of inputs or sign vector (of +1, -1)	[1;-1]

• Number of inputs or sign vector :Select this parameter to require that all inputs must have the same data type.

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• number/sizes of inputs: 2 / -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: summation

Interfacing function

scilab/macros/scicos_blocks/linear/SUMMATION.sci

Computational function (type 4)

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

void summation(scicos_block *block,int flag)
{
  int j,k;
  if(flag==1){
    if (block->nin==1){
      block->outptr[0][0]=0.0;
      for (j=0;j<block->insz[0];j++) {
	block->outptr[0][0]=block->outptr[0][0]+block->inptr[0][j];
      }
    }
    else {
      for (j=0;j<block->insz[0];j++) {
	block->outptr[0][j]=0.0;
	for (k=0;k<block->nin;k++) {
	  if(block->ipar[k]>0){
	    block->outptr[0][j]=block->outptr[0][j]+block->inptr[k][j];
	  }else{
	    block->outptr[0][j]=block->outptr[0][j]-block->inptr[k][j];
	  }
	}
      }
    }
  }
}