我搞砸了Accord.NET中不同的深度学习算法。我决定对我周围的光谱数据进行处理。 I PCA使用Accord的统计工具箱转换数据,以便将其减少到10个数据点。然后按照教程中的字母进行操作:
// Setup the deep belief network and initialize with random weights.
DeepBeliefNetwork network = new DeepBeliefNetwork(transformedInputs.First().Length, 10, 10);
new GaussianWeights(network, 0.1).Randomize();
network.UpdateVisibleWeights();
// Setup the learning algorithm.
DeepBeliefNetworkLearning teacher = new DeepBeliefNetworkLearning(network)
{
Algorithm = (h, v, i) => new ContrastiveDivergenceLearning(h, v)
{
LearningRate = 0.1,
Momentum = 0.5,
Decay = 0.001,
}
};
// Setup batches of input for learning.
int batchCount = Math.Max(1, transformedInputs.Length / 100);
// Create mini-batches to speed learning.
int[] groups = Accord.Statistics.Tools.RandomGroups(transformedInputs.Length, batchCount);
double[][][] batches = transformedInputs.Subgroups(groups);
// Learning data for the specified layer.
double[][][] layerData;
// Unsupervised learning on each hidden layer, except for the output layer.
for (int layerIndex = 0; layerIndex < network.Machines.Count - 1; layerIndex++)
{
teacher.LayerIndex = layerIndex;
layerData = teacher.GetLayerInput(batches);
for (int i = 0; i < 200; i++)
{
double error = teacher.RunEpoch(layerData) / transformedInputs.Length;
if (i % 10 == 0)
{
Console.WriteLine(i + ", Error = " + error);
}
}
}
// Supervised learning on entire network, to provide output classification.
var teacher2 = new BackPropagationLearning(network)
{
LearningRate = 0.1,
Momentum = 0.5
};
// Run supervised learning.
for (int i = 0; i < 500; i++)
{
double error = teacher2.RunEpoch(transformedInputs, output: outputs);
if (i % 10 == 0)
{
Console.WriteLine(i + ", Error = " + error);
}
}
我检查了输入的数据,输入和输出的格式都是正确的double [] []格式。我还检查了原始应用程序:https://github.com/primaryobjects/deep-learning
而且效果非常好,因此我很努力地看到,仅更改输入数据的内容就变得如此混乱。任何帮助将不胜感激。我得到的错误是:
An unhandled exception of type 'System.IndexOutOfRangeException' occurred in Accord.Neuro.dll
附加信息:索引超出了数组的范围。
最佳答案
当然,发布此问题之后,我立即意识到我的网络将必须反映输出的数量,并且该数量被设置为10。非常抱歉打扰这个出色的社区。