[R] Error in Rose Method (class balancing)

[Rasmus Liland]

On 2020-07-22 16:08 -0700, David Winsemius wrote:
| On 7/22/20 3:43 PM, Neha gupta wrote:
| | Hello,
| | 
| | I get the following error when I use 
| | the ROSE class balancing method but 
| | when I use other methods like SMOTE, 
| | up, down, I do not get any error 
| | message.
| | 
| | Something is wrong; all the ROC 
| | metric values are missing:
| | 
| | ROC Sens Spec
| | Min. : NA Min. : NA Min. : NA
| | 1st Qu.: NA 1st Qu.: NA 1st Qu.: NA
| | Median : NA Median : NA Median : NA
| | Mean :NaN Mean :NaN Mean :NaN
| | 3rd Qu.: NA 3rd Qu.: NA 3rd Qu.: NA
| | Max. : NA Max. : NA Max. : NA
| | 
| | library(DMwR)
| | d=readARFF("bughunter.arff")
| 
| After installing that package and 
| loading pkg:DMwR I get:
| 
| 	Error in readARFF("bughunter.arff") : could not find function "readARFF"

*Psst* ... I think this is 
farff::readARFF ... Where is 
"bughunter.arff" from?

| | 	[[alternative HTML version deleted]]
| 
| Since you also posted in HTML, I 
| suggest you read the Posting Guide, 
| restart and R session and post a 
| reproducible example that loads all 
| needed packages and data.

Hear, hear

| | index <- createDataPartition(d$`Bug class`, p = .70,list = FALSE)

Maybe this is 
caret::createDataPartition?

| | tr <- d[index, ]
| | 
| | ts <- d[-index, ]
| | 
| | boot3 <- trainControl(method = "repeatedcv", number=10,
| | repeats=10,classProbs = TRUE,verboseIter = FALSE,

Also caret ... ?caret::trainControl

| | summaryFunction = twoClassSummary, sampling = "rose")

Missing “(” also perhaps other params 
have fallen off here ?  The C looks like 
a paranthesis because of camel-case 
maybe ... hmmm ...

| | set.seed(30218)
| | 
| | ct <- train(`Bug class` ~ ., data = tr,
| | 	method = "pls",
| | 	metric = "AUC",
| | 	preProc = c("center", "scale", "nzv"),
| | 	trControl = boot3)
| | 
| | getTrainPerf(ct)
| 

V

r

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