R 分层k-折叠情况下混淆矩阵和的计算

我是机器学习新手。我在我的数据集上应用了分层k倍。如何得到混淆矩阵的和

下面是我的代码

library(MASS)

cv_lda <- lapply(folds, function(x) { # start of function
  # in the next two lines we will separate the Training set into it's 10 pieces
  training_fold = ForwardPlayers[-x, ] # training fold =  training set minus (-) it's sub test fold
  test_fold = ForwardPlayers[x, ] # here we describe the test fold individually
  # now apply (train) the classifer on the training_fold
  classifier = lda(Rating ~ .,training_fold)
  # next step in the loop, we calculate the predictions and cm and we equate the accuracy
  # note we are training on training_fold and testing its accuracy on the test_fold
  y_pred = predict(classifier, newdata = test_fold[-1]) 

  cm = table(test_fold$Rating, y_pred$class)
  #accuracy <- sum(diag(cm))/sum(cm)

  return(cm)
})

库（MASS）
你试过这个吗

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