Makes sure ranger method can generate grid of length 1. #1307
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Currently, ranger gives an error if passed with `trainControl(method = "none")`. You can see the error here: ``` rm( list = ls()) n <- 1e3 x <- cbind(x = rnorm(n)) y <- c(x + rnorm(n)) train(x, y, method = "ranger", trControl = trainControl(method = "none")) ``` This was happening because the minimal grid was a length 2, as it was passing both `srule` and "extratrees" to expand.grid regardless of the argument `len`. The proposed change makes sure expand.grid will have length 1, if `len = 1`.
carloscinelli
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carloscinelli
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Currently, ranger gives an error if passed with
trainControl(method = "none"). You can see the error here:This was happening because the minimal grid it was creating has length 2, as it was passing both
sruleand "extratrees" to expand.grid regardless of the argumentlen.The proposed change makes sure expand.grid will have length 1, if
len = 1.(and this does not affect the behavior of anything else whenever len > 1)