Get information of an lgb.Dataset object
Get one attribute of a lgb.Dataset
getinfo(dataset, ...) ## S3 method for class 'lgb.Dataset' getinfo(dataset, name, ...)
dataset |
Object of class |
... |
other parameters |
name |
the name of the information field to get (see details) |
The name field can be one of the following:
label: label lightgbm learn from ;
weight: to do a weight rescale ;
group: used for learning-to-rank tasks. An integer vector describing how to
group rows together as ordered results from the same set of candidate results to be ranked.
For example, if you have a 100-document dataset with group = c(10, 20, 40, 10, 10, 10),
that means that you have 6 groups, where the first 10 records are in the first group,
records 11-30 are in the second group, etc.
init_score: initial score is the base prediction lightgbm will boost from.
info data
data(agaricus.train, package = "lightgbm") train <- agaricus.train dtrain <- lgb.Dataset(train$data, label = train$label) lgb.Dataset.construct(dtrain) labels <- lightgbm::getinfo(dtrain, "label") lightgbm::setinfo(dtrain, "label", 1 - labels) labels2 <- lightgbm::getinfo(dtrain, "label") stopifnot(all(labels2 == 1 - labels))
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