Пример #1
0
 /**
  * Convert a collection of hyper-parameter search arrays into a double- dimension
  * array-of-doubles. Missing hyper parms will be filled in with the default value.
  *
  * @param hypers A set of {hyper-parameter field names, search space values}
  * @return The same set as a double[][]
  */
 private double[][] hyper2doubles(Map<String, Object[]> hypers) {
   String[] ss = hyperNames();
   double[] defs = hyperDefaults();
   double[][] dss = new double[ss.length][];
   int cnt = 0; // Count of found hyper parameters
   for (int i = 0; i < ss.length; i++) { // For all hyper-names
     Object[] os = hypers != null ? hypers.get(ss[i]) : null; // Get an array-of-something
     if (os == null) os = new Object[] {defs[i]}; // Missing?  Use default
     else cnt++; // Found a hyper parameter
     double[] ds = dss[i] = new double[os.length]; // Array of params for search
     for (int j = 0; j < os.length; j++) ds[j] = ReflectionUtils.asDouble(os[j]);
   }
   if (hypers != null && cnt != hypers.size()) // Quicky error check for unknow parms
   for (String s : hypers.keySet())
       if (ArrayUtils.find(ss, s) == -1)
         throw new IllegalArgumentException("Unkown hyper-parameter " + s);
   return dss;
 }
Пример #2
0
  /** Factory method to create the model-specific parameters schema. */
  public final P createParametersSchema() {
    // special case, because ModelBuilderSchema is the top of the tree and is parameterized
    // differently
    if (ModelBuilderSchema.class == this.getClass()) {
      return (P) new ModelParametersSchemaV3();
    }

    try {
      Class<? extends ModelParametersSchemaV3> parameters_class =
          ReflectionUtils.findActualClassParameter(this.getClass(), 2);
      return (P) parameters_class.newInstance();
    } catch (Exception e) {
      throw H2O.fail(
          "Caught exception trying to instantiate a builder instance for ModelBuilderSchema: "
              + this
              + ": "
              + e,
          e);
    }
  }