code: function(opt) {
      var opt = opt || {};
  
      // required
      this.k = opt.k;
      this.n = opt.n;
      this.alpha = opt.alpha;
      this.beta = opt.beta;
  
      // computed
      this.out_sx = opt.in_sx;
      this.out_sy = opt.in_sy;
      this.out_depth = opt.in_depth;
      this.layer_type = 'lrn';
  
      // checks
      if(this.n%2 === 0) { console.log('WARNING n should be odd for LRN layer'); }
    }
docs: a bit experimental layer for now. I think it works but I'm not 100% the gradient check is a bit funky. I'll look into this a bit later. Local Response Normalization in window, along depths of volumes