R: Get record evaluation result from booster

lgb.get.eval.result {lightgbm} | R Documentation

## Get record evaluation result from booster

### Description

Get record evaluation result from booster

### Usage

    lgb.get.eval.result(booster, data_name, eval_name, iters = NULL,
      is_err = FALSE)

### Arguments

`booster` | Object of class `lgb.Booster`
`data_name` | name of dataset
`eval_name` | name of evaluation
`iters` | iterations, NULL will return all
`is_err` | TRUE will return evaluation error instead

### Value

vector of evaluation result

### Examples

    library(lightgbm)
    data(agaricus.train, package = "lightgbm")
    train <- agaricus.train
    dtrain <- lgb.Dataset(train$data, label = train$label)
    data(agaricus.test, package = "lightgbm")
    test <- agaricus.test
    dtest <- lgb.Dataset.create.valid(dtrain, test$data, label = test$label)
    params <- list(objective = "regression", metric = "l2")
    valids <- list(test = dtest)
    model <- lgb.train(params,
                       dtrain,
                       100,
                       valids,
                       min_data = 1,
                       learning_rate = 1,
                       early_stopping_rounds = 10)
    lgb.get.eval.result(model, "test", "l2")

[Package lightgbm version 2.2.3 Index]