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When I run random forest in R package and use plot function, there have many curves including out of bag error rate curve (black colour) and the misclassification error rate curves (other colours). However, I only would like to show on the plot only the out of bag error rate curve. How can I do that?

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2 Answers 2

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The curves can be subsetted using the $ symbol in R.

So, this is how you single out the error rate curve.

$err.rate

You might also want to look at the documentation of the random forest plot by: (?plot.randomForest)

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  • $\begingroup$ How would you plot the err.rate then? plot(someModel$err.rate) does not do the trick $\endgroup$
    – four-eyes
    Commented Sep 5, 2016 at 12:48
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More in detail:

Your confusion Matrix contains a variable, called err.rate which you access with the $ sign. The err.rate is stored as a matrix where the first column is the OOB Error. Each class gets its own column. Try str(someModel$err.rate).

To access the err.rate do this $err.rate[,1], for plotting simply plot(myModel $err.rate[,1]). The other columns in your matrix are the error rates of your classes!

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