请帮助我!我正在使用deeplearning4j
开展一个项目。 MNIST示例运行得非常好,但是我的数据集出现错误。 我的数据集有两个输出。使用MNIST示例的deeplearning4j代码错误
int height = 45;
int width = 800;
int channels = 1;
int rngseed = 123;
Random randNumGen = new Random(rngseed);
int batchSize = 128;
int outputNum = 2;
int numEpochs = 15;
File trainData = new File("C:/Users/JHP/Desktop/learningData/training");
File testData = new File("C:/Users/JHP/Desktop/learningData/testing");
FileSplit train = new FileSplit(trainData, NativeImageLoader.ALLOWED_FORMATS, randNumGen);
FileSplit test = new FileSplit(testData, NativeImageLoader.ALLOWED_FORMATS, randNumGen);
ParentPathLabelGenerator labelMaker = new ParentPathLabelGenerator();
ImageRecordReader recordReader = new ImageRecordReader(height, width, channels, labelMaker);
ImageRecordReader recordReader2 = new ImageRecordReader(height, width, channels, labelMaker);
recordReader.initialize(train);
recordReader2.initialize(test);
DataSetIterator dataIter = new RecordReaderDataSetIterator(recordReader, batchSize, 1, outputNum);
DataSetIterator testIter = new RecordReaderDataSetIterator(recordReader2, batchSize, 1, outputNum);
DataNormalization scaler = new ImagePreProcessingScaler(0, 1);
scaler.fit(dataIter);
dataIter.setPreProcessor(scaler);
System.out.println("Build model....");
MultiLayerConfiguration conf = new NeuralNetConfiguration.Builder()
.seed(rngseed)
.optimizationAlgo(OptimizationAlgorithm.STOCHASTIC_GRADIENT_DESCENT)
.iterations(1)
.learningRate(0.006)
.updater(Updater.NESTEROVS).momentum(0.9)
.regularization(true).l2(1e-4)
.list()
.layer(0, new DenseLayer.Builder()
.nIn(height * width)
.nOut(1000)
.activation(Activation.RELU)
.weightInit(WeightInit.XAVIER)
.build()
)
.layer(1, newOutputLayer.Builder(LossFunction.NEGATIVELOGLIKELIHOOD)
.nIn(1000)
.nOut(outputNum)
.activation(Activation.SOFTMAX)
.weightInit(WeightInit.XAVIER)
.build()
)
.pretrain(false).backprop(true)
.build();
MultiLayerNetwork model = new MultiLayerNetwork(conf);
model.init();
model.setListeners(new ScoreIterationListener(1));
System.out.println("Train model....");
for (int i = 0; i < numEpochs; i++) {
try {
model.fit(dataIter);
} catch (Exception e) {
System.out.println(e);
}
}
误差是
org.deeplearning4j.exception.DL4JInvalidInputException:输入是 不是一个矩阵;预期矩阵(等级2),得到具有形状的等级4阵列 [128,1,45,800]
我认为有必要将DataSetIterator函数更改为另一个函数。在MNIST示例中,它就像将数据导入函数一样。 ** DataSetIterator mnistTrain = new MnistDataSetIterator(batchSize,true,rngseed); ** 我不知道要使用什么函数。 – user7887249
@TriV TriV非常感谢您让我知道需要改进的地方!我不知道,因为我第一次使用堆栈溢出。非常感谢你! – user7887249