CODEWITHSUNDEEP
rrandom-foresttext-mining
AlisonGrey
AlisonGrey

Reputation: 507

R Randomforest undefined column issue

I am working on a text mining process and using Random forest to classify text to categories. I am using caret package after processing my text. I split the data to train and test, Below is the R code after the same:

traindata <- tdm_df[s,] # training set

testdata <- tdm_df[-s,] # testing set

rf.tfidf <- train(traindata[,c(1:69)], train[,70],
                  method = "rf", trControl = ctrl) # train random forest
rf.tfidf

When I run the last line, I get the below error:

Error in `[.data.frame`(train, , c(1:56)) : undefined columns selected

Edit 1: next error after correction: Error in train[1:5, ] : object of type 'closure' is not subsettable

I see the term_sparse is giving me an issue and may be the text mining part, how can i improve my outcome?

Not sure what the issue is. Please help out!

Upvotes: 0

Views: 135

Answers (1)

tushaR
tushaR

Reputation: 3116

Replace train[,70] with traindata[,70]:

rf.tfidf <- train(traindata[,c(1:69)], traindata[,70],
              method = "rf", trControl = ctrl)

Upvotes: 1

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