caret ^ include everything greater than a particular version in the same major range. tilde ~ include everything greater than a particular version in the same minor range. For example, to specify acceptable version ranges up to 1.0.4, use the following syntax:

2015年11月2日 · In the first page of the short introduction document for caret package, it is mentioned that the optimal model is chosen across the parameters. As a starting point, one must understand that cross-validation is a procedure for selecting best modeling approach rather than the model itself CV - Final model selection .

2018年7月27日 · Answer by @topepo (Caret package main developer). See detailed Github thread here.. It looks like it happens when you have one hidden unit and almost no regularization.

2015年6月30日 · There is just the savePredictions = TRUE argument missing from ctrl (this also works for other resampling methods):

2017年6月1日 · Solo Caret vs. Caret with greedy optional character. 1. JavaScript caret in regex not working as expected.

2017年6月27日 · Said function is passed as the named parameter trControl to caret's train method. This cuts down training time substantially when introducing cross-validation for the splitting on variables during the tree growing phase. This is the most time-consuming part of the rf ensemble method.

2008年12月4日 · The ^ (Caret - or Ascii Circumflex), produced by pressing shift + 6, does not appear to have an Ascii opposite, namely an Ascii Inverted Circumflex. But for your alternative character pairing that also have keyboard combinations, you could use:

2021年12月14日 · As a side note, the __r*__ version of these (like __rxor__ or __radd__) will be invoked from the argument appearing on the right hand side of the infix symbol, and only if the call to the function for the left hand symbol doesn't work.

2013年8月23日 · I've build a model using caret. When the training was completed I got the following warning: Warning message: In train.default(x, y, weights = w, ...) : At least one of the class levels are not valid R variables names; This may cause errors if class probabilities are generated because the variables names will be converted to: X0, X1

2020年12月20日 · So what worked for me is a bit old school: after installing the caret package and getting that error, I did a quick search on my PC for caret (In my case; I went to ThisPC > RoseAdediran), deleted the caret folder, searched for plyr and deleted the folder as well. Went back to RStudio, restarted the session and tried this code again