Function nodeHandle

browser.js:2092–2127

(layers, layerNumber, nodeKey)

      var leakyReluAlpha = this.leakyReluAlpha;
      var needsVar = false;
      function nodeHandle(layers, layerNumber, nodeKey) {
        if (layerNumber === 0) {
          return typeof nodeKey === 'string' ? 'input[\'' + nodeKey + '\']' : 'input[' + nodeKey + ']';
        }

        var layer = layers[layerNumber];
        var node = layer[nodeKey];
        var result = ['(', node.bias];
        for (var w in node.weights) {
          if (node.weights[w] < 0) {
            result.push(node.weights[w] + '*' + nodeHandle(layers, layerNumber - 1, w));
          } else {
            result.push('+' + node.weights[w] + '*' + nodeHandle(layers, layerNumber - 1, w));
          }
        }
        result.push(')');

        switch (activation) {
          case 'sigmoid':
            return '1/(1+1/Math.exp(' + result.join('') + '))';
          case 'relu':
            {
              needsVar = true;
              return '((v=' + result.join('') + ')<0?0:v)';
            }
          case 'leaky-relu':
            {
              needsVar = true;
              return '((v=' + result.join('') + ')<0?0:' + leakyReluAlpha + '*v)';
            }
          case 'tanh':
            return 'Math.tanh(' + result.join('') + ')';
          default:
            throw new Error('unknown activation type ' + activation);
        }
      }

      var layers = this.toJSON().layers;
      var layersAsMath = [];