r - H2O（来自 R 包 h2o）可以保存和重新加载训练数据吗？

Question

我正在尝试H2O通过 R 包进行深度学习h2o，并想问是否H2O可以保存和重新加载训练数据以供将来进行额外训练？

我的代码：

iris.train <- irisdata[-1,]
iris.test <- irisdata[1,]

res.dl <- h2o.deeplearning(x = 1:4, y = 5_offset, data = iris.train, activation = "Rectifier")
pred.dl <- h2o.predict(object=res.dl, newdata=iris.test)
res.err.dl[i] <- ifelse(as.character(as.matrix(pred.dl)[1,1]) == as.character(as.matrix(iris.test)[1,5]),0,1)

Answer 1

h2o.saveModel(object, dir = "", name = "", filename = "", force = FALSE)

和

h2o.loadModel(path, conn = h2o.getConnection())

Answer 2

我最近在 h2o 的 2.8.6 版本中构建深度学习模型时使用的一个工作示例。模型保存在 hdfs 中。对于最新版本，您可能必须删除分类 = T 开关并必须用 training_frame 替换数据

library(h2o)
h = h2o.init(ip="xx.xxx.xxx.xxx", port=54321, startH2O = F)

cTrain.h2o <- as.h2o(h,cTrain,key="c1")
cTest.h2o <- as.h2o(h,cTest,key="c2")

nh2oD<-h2o.deeplearning(x =c(1:12),y="tgt",data=cTrain.h2o,classification=F,activation="Tanh",
                        rate=0.001,rho=0.99,momentum_start=0.5,momentum_stable=0.99,input_dropout_ratio=0.2,                        
                        hidden=c(12,25,11,11),hidden_dropout_ratios=c(0.4,0.4,0.4,0.4),
                        epochs=150,variable_importances=T,seed=1234,reproducible = T,l1=1e-5,
                        key="dn")

hdfsdir<-"hdfs://xxxxxxxxxx/user/xxxxxx/xxxxx/models"

h2o.saveModel(nh2oD,hdfsdir,name="DLModel1",save_cv=T,force=T)

test=h2o.loadModel(h,path=paste0(hdfsdir,"/","DLModel1"))