R中过采样示例中的错误

我运行下面的代码在R过采样

varNames1 = paste0("Quote.Type","+","Quote.State","+","Forecast.Type","+","Suggested.Reseller.Discount","+","Territory","+","Pricing.Type")

ctrl <- trainControl(method = "repeatedcv", 
                                           number = 10, 
                                           repeats = 10, 
                                           verboseIter = FALSE,
                                           sampling = "up")

set.seed(42)
model_rf_under <- caret::train(renew.dev$Result ~ varNames1,
                               data = renew.dev,
                               method = "rf",
                               preProcess = c("scale", "center"),
                               trControl = ctrl)

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嗨，贾文德，你能给我们一个可复制的例子吗？因为找不到对象“renew.dev”。感谢公式的构造是不正确的。使用：

as.formula（paste0（“Result~”，varNames1））

而不是

renew.dev$Result~varNames1

。我正处于学习阶段，这很有价值，谢谢@juanantoniroldánDíaz为我工作。

Error in model.frame.default(form = renew.dev$Result ~ varNames1, data = renew.dev,  : 
  variable lengths differ (found for 'varNames1')