r 语言问题：terms.formula(formula, data = data): '.' 中的错误在公式中，没有“数据”参数

Question

i'm using https://archive.ics.uci.edu/ml/machine-learning-databases/heart-disease/ prcocessed.cleveland.data to do random forest

sample = sample.split(processed_cleveland$num, SplitRatio = .75)

train = subset(processed_cleveland, sample == TRUE)

test  = subset(processed_cleveland, sample == FALSE)

rf <- randomForest(
         num ~ .,
         processedcleveland=train
    )

And then it shows

Error in terms.formula(formula, data = data) : 
'.' in formula and no 'data' argument

I don't know how to resolve it

Answer 1

The problem is that the randomForest function expects an argument called data , but you're trying to pass your data, train , to an argument called processedcleveland .

This should fix it:

rf <- randomForest(
         num ~ .,
         data=train
    )