R中的caretStack-未使用的参数
我在R中做了一堆模型,如下所示:R中的caretStack-未使用的参数,r,r-caret,ensemble-learning,ensembles,R,R Caret,Ensemble Learning,Ensembles,我在R中做了一堆模型,如下所示: ctrl <- trainControl(method="repeatedcv", number=5, repeats=3, returnResamp="final", savePredictions="final", classProbs=TRUE, selectionFunction="oneSE", verboseIter=TRUE) models_stack <- caretStack( model_list, data=train
ctrl <- trainControl(method="repeatedcv", number=5, repeats=3, returnResamp="final", savePredictions="final", classProbs=TRUE, selectionFunction="oneSE", verboseIter=TRUE)
models_stack <- caretStack(
model_list,
data=train_data,
tuneLength=10,
method="glmnet",
metric="ROC",
trControl=ctrl
)
2) 是否不应该有“数据”参数?如果我需要为我的1级主管模型使用不同的数据集,我可以做什么
3) 我还想使用AUC/ROC,但出现了这些错误
The metric "AUC" was not in the result set. Accuracy will be used instead.
及
我在网上看到了一些ROC可以使用的例子,是不是因为它不适合这个模型?除了此模型的准确性之外,我还可以使用哪些指标?如果我需要使用ROC,还有哪些选项
按照@RLave的要求,我的型号列表就是这样完成的
grid.xgboost <- expand.grid(.nrounds=c(40,50,60),.eta=c(0.2,0.3,0.4),
.gamma=c(0,1),.max_depth=c(2,3,4),.colsample_bytree=c(0.8),
.subsample=c(1),.min_child_weight=c(1))
grid.rf <- expand.grid(.mtry=3:6)
model_list <- caretList(y ~.,
data=train_data_0,
trControl=ctrl,
tuneList=list(
xgbTree=caretModelSpec(method="xgbTree", tuneGrid=grid.xgboost),
rf=caretModelSpec(method="rf", tuneGrid=grid.rf)
)
)
grid.xgboost您的问题包含三个问题:
为什么我会看到以下错误?我能做什么?我现在卡住了
caretStack
不应具有数据
参数,数据
是根据caretList
中的模型预测生成的。看看这个可重复的例子:
library(caret)
library(caretEnsemble)
library(mlbench)
使用声纳数据集:
data(Sonar)
为xgboost的超参数优化创建网格:
grid.xgboost <- expand.grid(.nrounds = c(40, 50, 60),
.eta = c(0.2, 0.3, 0.4),
.gamma = c(0, 1),
.max_depth = c(2, 3, 4),
.colsample_bytree = c(0.8),
.subsample = c(1),
.min_child_weight = c(1))
grid.xgboost@RLave嗨,我已经完成了更新
data(Sonar)
grid.xgboost <- expand.grid(.nrounds = c(40, 50, 60),
.eta = c(0.2, 0.3, 0.4),
.gamma = c(0, 1),
.max_depth = c(2, 3, 4),
.colsample_bytree = c(0.8),
.subsample = c(1),
.min_child_weight = c(1))
grid.rf <- expand.grid(.mtry = 3:6)
ctrl <- trainControl(method="cv",
number=5,
returnResamp = "final",
savePredictions = "final",
classProbs = TRUE,
selectionFunction = "oneSE",
verboseIter = TRUE,
summaryFunction = twoClassSummary)
model_list <- caretList(Class ~.,
data = Sonar,
trControl = ctrl,
tuneList = list(
xgbTree = caretModelSpec(method="xgbTree",
tuneGrid = grid.xgboost),
rf = caretModelSpec(method = "rf",
tuneGrid = grid.rf))
)
models_stack <- caretStack(
model_list,
tuneLength = 10,
method ="glmnet",
metric = "ROC",
trControl = ctrl
)