All Questions
Tagged with classifierscikit-learn
7 questions
1vote
1answer
79views
How to tune the classification threshold in a cost-sensitive manner?
I have trained a classifier outputting probabilities for each class. I want to tune the decision threshold in such a way that it accounts for different costs/gains assigned to false positives ($FP$), $...
- 1,989
2votes
4answers
147views
4votes
1answer
378views
Selecting a boundary on a binary classifier to optimal precision and recall
I have a logistic regression classifier that shows differing levels of performance for precision and recall at different probability boundaries as follows: The default threshold for the classifier to ...
- 267
0votes
1answer
491views
Discrete values as target variable
I have discrete values in the target variable(Exactly 13 different values in total) . When I am giving that as input to Random forest Classifier ,it gives error that input as continuous. And if I give ...
- 119
2votes
3answers
1kviews
Why is my training accuracy decreasing higher degrees of polynomial features?
I am new to Machine Learning and started solving the Titanic Survivor problem on Kaggle. While solving the problem using Logistic Regression I used various models having polynomial features with ...
- 151
15votes
2answers
28kviews
How do I get the feature importace for a MLPClassifier?
I use the MLPClassifier from scikit learn. I have about 20 features. Is there a scikit method to get the feature importance? I found clf.feature_importances_ but it seems that it only exists for ...
- 611
1vote
2answers
1kviews
ROC curve shows strange results for imbalanced dataset
I have a classifier with a heavily imbalanced dataset (1000 of each negative label for each positive.) I'm running a GradientBoostingClassifier with moderate success (AUC .75) but the curve has this ...
- 167
