Interfacing function
eng

##
EXTRACTOR

### File content

    function [x,y,typ]=EXTRACTOR(job,arg1,arg2)
      x=[];y=[];typ=[]
      select job
       case 'plot' then
        standard_draw(arg1)
       case 'getinputs' then
        [x,y,typ]=standard_inputs(arg1)
       case 'getoutputs' then
        [x,y,typ]=standard_outputs(arg1)
       case 'getorigin' then
        [x,y]=standard_origin(arg1)
       case 'set' then
        x=arg1;
        graphics=arg1.graphics;exprs=graphics.exprs
        model=arg1.model;
        while %t do
          [ok,ind,exprs]=..
    	  getvalue('Set block parameters',..
    		   ['indices to extract'],..
    		   list('vec',-1),exprs)
          if ~ok then break,end
          ind=int(ind);ind=ind(:);
          [model,graphics,ok]=check_io(model,graphics,[-1],size(ind,1),[],[])
          if ok then
    	model.ipar=ind
    	graphics.exprs=exprs;
    	x.graphics=graphics;x.model=model
    	break
          end
        end
       case 'define' then
        ind=1
        model=scicos_model()
        model.sim=list('extractor',4)
        model.in=-1
        model.out=1
        model.blocktype='c'
        model.dep_ut=[%t %f]
        model.ipar=ind
        exprs=[sci2exp(ind)]
        gr_i=['txt=[''Extractor''];';
              'xstringb(orig(1),orig(2),txt,sz(1),sz(2),''fill'');']
        x=standard_define([2 2],model,exprs,gr_i)
      end
    endfunction