Run into a problem since I updated R libraray of xgboost to 0.82.1 (on Windows 10).
Even when I run the following example that is provided in R help, the xgb.importance does lead to an error:
data(agaricus.train, package='xgboost') bst <- xgboost(data = agaricus.train$data, label = agaricus.train$label, max_depth = 2, eta = 1, nthread = 2, nrounds = 2, objective = "binary:logistic")  train-error:0.046522  train-error:0.022263 xgb.importance(model = bst) Error in stri_detect_regex(text, "yes=(\\d+),no=(\\d+)") : argument `opts_regex` should be a list
I’m not able to find out what the problem is. Any suggestions or solutions? Thank you!