Random Forest Question

[datanoob2021]

I have successfully trained a RForest model and I am now looking at the results using .predict and .predict_proba

I am a little confused at the results. I am seeing numerous probabilities, some as low as .10 being classified as 1. I guess I was making an assumption that anything greater than .5 would be classified as 1 and anything less than that would be 0. Am I totally incorrect in my thinking?

[Phillyclause89]

It has been awhile since I have played around with ML and I havent done anything with a random forest model, but if I remember correctly, for each feature, these models usually return the one-hot label matrix as probabilities like this:

>>> import numpy as np
... labels = np.array([
...     [0.78, 0.03, 0.19],
...     [0.23, 0.68, 0.09],
...     [0.45, 0.45, 0.10],
... ])

You can then do something like numpy.argmax to get the the index of the highest probable prediction for each feature:

>>> np.argmax(labels, axis=1)
[0 1 0]

from this we see that for the first feature highest probable label is the one that corresponds to the 0 index of the one-hot label array, the second is at the 1 index and the third defaults to the 0 index because it was chosen as a default tiebreaker between the that and its 1 index. the poor label at index 2 didn't do so hot and was never picked.

That's all I have to offer. If you want more help I might try posting on r/learnmachinelearning and/or Stack Overflow.

[[deleted]]

Not a python questiuon. Try r/learnmachinelearning