function reset()

in src/playground.ts [940:964]

• 22 lines of code
• 4 McCabe index (conditional complexity)

function reset(onStartup=false) {
  lineChart.reset();
  state.serialize();
  if (!onStartup) {
    userHasInteracted();
  }
  player.pause();

  let suffix = state.numHiddenLayers !== 1 ? "s" : "";
  d3.select("#layers-label").text("Hidden layer" + suffix);
  d3.select("#num-layers").text(state.numHiddenLayers);

  // Make a simple network.
  iter = 0;
  let numInputs = constructInput(0 , 0).length;
  let shape = [numInputs].concat(state.networkShape).concat([1]);
  let outputActivation = (state.problem === Problem.REGRESSION) ?
      nn.Activations.LINEAR : nn.Activations.TANH;
  network = nn.buildNetwork(shape, state.activation, outputActivation,
      state.regularization, constructInputIds(), state.initZero);
  lossTrain = getLoss(network, trainData);
  lossTest = getLoss(network, testData);
  drawNetwork(network);
  updateUI(true);
};