DecisionTreeClassifier.fromJson constructor

DecisionTreeClassifier.fromJson(String json)

Restores previously fitted classifier instance from the given json

import 'dart:io';
import 'package:ml_dataframe/ml_dataframe.dart';

final data = <Iterable>[
  ['feature 1', 'feature 2', 'feature 3', 'outcome']
  [        5.0,         7.0,         6.0,       1.0],
  [        1.0,         2.0,         3.0,       0.0],
  [       10.0,        12.0,        31.0,       0.0],
  [        9.0,         8.0,         5.0,       0.0],
  [        4.0,         0.0,         1.0,       1.0],
];
final targetName = 'outcome';
final samples = DataFrame(data, headerExists: true);
final classifier = DecisionTreeClassifier(
  samples,
  targetName,
  minError: 0.3,
  minSamplesCount: 1,
  maxDepth: 3,
);

final pathToFile = './classifier.json';

await classifier.saveAsJson(pathToFile);

final file = File(pathToFile);
final json = await file.readAsString();
final restoredClassifier = DecisionTreeClassifier.fromJson(json);

// here you can do whatever you want with the restored classifier

Implementation

factory DecisionTreeClassifier.fromJson(String json) =>
    initDecisionTreeModule()
        .get<DecisionTreeClassifierFactory>()
        .fromJson(json);