Question

我正在尝试使用以下代码来找到一种方法，将fancyRpartPlot之后出现的图像输出保存为pdf，以绘制回归树。谁知道我怎么能这样做？我无法通过网络找到任何答案。

regression_tree <- data.frame(stock_mag = as.numeric(resData$stock_mag), 
                   LT = as.numeric(resData$Lead_Time), 
                   dmIn = as.numeric(resData$Intermittency), 
                   dmCv = as.numeric(resData$CoV))

fit<-rpart(stock_mag~dmCv+dmIn+LT,data=regression_tree, method="anova",          control=rpart.control(minsplit=20))
x11()

fancyRpartPlot(fit, main="test")   # Will plot the tree#

谢谢！

Answer 1

这应该与使用pdf()：

的其他每个地块一样

library(rattle)
library(rpart)
set.seed(42)
ds     <- weather
target <- "RainTomorrow"
risk   <- "RISK_MM"
ignore <- c("Date", "Location", risk)
vars   <- setdiff(names(ds), ignore)
nobs   <- nrow(ds)
form   <- formula(paste(target, "~ ."))
train  <- sample(nobs, 0.7*nobs)
test   <- setdiff(seq_len(nobs), train)
actual <- ds[test, target]
risks  <- ds[test, risk]
model <- rpart(form, data=ds[train, vars])

pdf(tf <- tempfile(fileext = ".pdf"))
fancyRpartPlot(model)
dev.off()
cat(tf) # filename

将fancyRpartPlot保存为pdf

1 个答案: