我正在尝试通过R stdio中的keras张量流建立分类模型,但我收到的错误如下.请问有没有人知道？这是我第一次使用keras或深度学习.谢谢
> set.seed(10)
> ind <- sample(2, nrow(stdk), replace=TRUE, prob=c(0.80, 0.2))
> stdk.train <- stdk[ind==1, ]
> stdk.test <- stdk[ind==2, ]
> change.train <- stdk[ind==1, 5]
> change.test <- stdk[ind==2, 5]
> stdk.trainLabels <- to_categorical(change.train)
> stdk.testLabels <- to_categorical(change.test)
>
> modelk <- keras_model_sequential()
> modelk %>%
+ layer_dense(units = 23, activation = 'relu', input_shape = c(40)) %>%
+ layer_dense(units = 9, activation = 'softmax')
> summary(modelk)
Model
Layer (type) Output Shape Param #
================================================================================================================
dense_1 (Dense) (None, 23) …