如何使用R / Rattle解释随机森林中的“级别”

Question

I am brand new at using R/Rattle and am having difficulty understanding how to interpret the last line of this code output. Here is the function call along with it's output:

> head(weatherRF$model$predicted, 10)
336 342 94 304 227 173 265 44 230 245
No No No No No No No No No No 
Levels: No Yes

This code is implementing a weather data set in which we are trying to get predictions for "RainTomorrow". I understand that this function calls for the predictions for the first 10 observations of the data set. What I do NOT understand is what the last line ("Levels: No Yes") means in the output.

Answer 1

It's called a factor variable.

That is the list of permitted values of the factor, here the values No and Yes are permitted.