[英]tuning naive Bayes classifier with Caret in R
我使用以下代碼訓練模型,但是,由於FL和Adjust始終保持在特定值,我無法找到如何更改微調網格的方法。(我的數據集是分類的)
Activity_nb <- train(Actx, Acty,data = Dact, method = "nb", trControl = myc1,metric = "Accuracy",importance = TRUE)
Naive Bayes
2694 samples
4 predictor
4 classes: 'CC', 'CE', 'CW', 'HA'
No pre-processing
Resampling: Cross-Validated (10 fold)
Summary of sample sizes: 2425, 2424, 2426, 2425, 2425, 2423, ...
Resampling results across tuning parameters:
usekernel Accuracy Kappa
FALSE 0.8165804 0.6702313
TRUE 0.8165804 0.6702313
Tuning parameter 'fL' was held constant at a value of 0
Tuning parameter 'adjust' was held constant at a value of 1
Accuracy was used to select the optimal model using the largest value.
The final values used for the model were fL = 0, usekernel = FALSE and adjust = 1.
grid <- data.frame(fL=c(0,0.5,1.0), usekernel = TRUE, adjust=c(0,0.5,1.0))
Activity_nb <- train(..., tuneGrid=grid, ...)
希望這可以幫助。
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