我正试图使用Caret进行机器学习,但是我要用的包没有被包含在内,导致出错,你有什么建议吗?我使用了这个链接来开始我的工作。
bmsMeth<-list(type="Regression",library="BMS",loop=NULL,prob=NULL)
prm<-data.frame(parameter="mprior.size",class="numeric",label="mprior.size")
bmsMeth$parameters<-prm
bmsGrid<-function(x,y,len=NULL){
out<-expand.grid(mprior.size=seq(2,3,by=len))
out
}
bmsMeth$grid<-bmsGrid
bmsFit<-function(x,y,param, lev=NULL) {bms(cbind(y,x),burn=5000,iter=100000,nmodel=1000,mcmc="bd",g="UIP",mprior.size=param$mprior.size)}
bmsMeth$fit<-bmsFit
bmsPred<-function(modelFit,newdata,preProcess=NULL,submodels=NULL){predict(modelFit,newdata)}
bmsMeth$predict<-bmsPred
library(caret)
data.train<-data.frame(runif(100),runif(100),runif(100),runif(100),runif(100))#synthetic data for testing
bms(cbind(data.train[,1],data.train[,-1]),burn=5000,iter=100000,nmodel=1000,mcmc="bd",g="UIP",mprior.size=2)#function out of caret is working
preProcess=c('center','scale')
myTimeControl <- trainControl(method = "timeslice",initialWindow = 0.99*nrow(data.train), horizon = 1, fixedWindow = FALSE)
tune <- train(data.train[,-1],data.train[,1],preProcess=preProcess,method = bmsMeth,tuneLength=2,metric= "RMSE",trControl =myTimeControl,type="Regression")
我遇到的错误:
在训练default(data.train[, -1], data.train[, 1], preProcess = preProcess)时出错,错误信息为:停止。此外还有警告信息:
1. 在eval(expr, envir, enclos)中,Training1的模型拟合失败:mprior.size=2,错误原因是方法$fit(x = x, y = y, wts = wts, param = tuneValue, lev = obsLevels)中存在未使用参数(wts = wts, last = last, classProbs = classProbs, type = "Regression")。
2. 在nominalTrainWorkflow(x = x, y = y, wts = weights, info = trainInfo)中,存在缺失值的重采样性能测量。