c++ - RcppShark 随机森林示例抛出有关随机数生成器的异常

Question

我按照这个例子:

https://www.2021.ai/randsharkmachinelearning/

在 R 上运行此命令时:

sharkFit <- SharkRFTrain(X, Y, nTrees = 100)

我得到:

Error in SharkRFTrain(X, Y, nTrees = 100) : 
  Should not call this. Fix the random numbers generator if you need this. 478

这个异常是从此“cpp”行抛出的:

trainer.train(model, trainData);

我怀疑原因写在这里:

https://github.com/aydindemircioglu/RcppShark#notes

The random number generator was replaced, as R packages must use the random generator from R and not the C/C++ internal one. Thereffore, a direct comparison of results of algorithms that depend on (pseudo) random numbers cannot be done.

有没有办法缓解这种情况？

尝试了两个 R 版本:3.4.1、3.3.2

Answer 1

我对此进行了调查，并能够在一定程度上缩小范围:

• 此处产生错误消息:https://github.com/aydindemircioglu/RcppShark/blob/master/src/shark/Rng/Runif.h#L71
• 调用代码在这里:https://github.com/aydindemircioglu/RcppShark/blob/master/src/src/Algorithms/RFTrainer.cpp#L178

由于我无法修复它，我在这里打开了一个问题:https://github.com/aydindemircioglu/RcppShark/issues/1