All Questions
9 questions
5
votes
1
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1k
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How to draw ROC curve for a multi-class dataset?
I have a multi-class confusion matrix as below and would like to draw its associated ROC curve for one of its classes (e.g. class 1).
I know the "one-VS-all others" theory should be used in ...
- 55
4
votes
2
answers
5k
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Area Under ROC Curve for Multiple Classes
I am working with a highly class-skewed three class classification problem. The class percentages are A = 1.8%, B = 17.5% and C = 80.7%. According to this paper, the following definition of multi-...
- 908
3
votes
2
answers
2k
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Difference between ROC-AUC and Multiclass AUC (MAUC)
I am trying to understand the interpretation of these metrics in a multiclass scenario: ROC-AUC and MAUC. Scikit-learn provides ...
- 283
3
votes
0
answers
2k
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ROC AUC for multiclass problem
Just some quick questions to clarify my doubt please.
I know that one can get precision/recall for each class in a multiclass problem, e.g. in this classification ...
- 225
2
votes
1
answer
7k
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Using predict_proba with sklearn's multiclass SVC
I'm using python's sklearn for multi-class classification (SVC)
When using the predict method, i get very high scores with my dataset,
However, I want to plot ROC curves for each of my classes. That ...
- 153
1
vote
0
answers
150
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Multiclass ROC curve about one vs one
I am learning ROC about multiclass problem.
I read this article https://towardsdatascience.com/multiclass-classification-evaluation-with-roc-curves-and-roc-auc-294fd4617e3a .
I am confused about ovo ...
- 11
0
votes
1
answer
104
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Interpreting classification metrics for multiclass imbalance
I am at the point of reporting my results in a research article conducted. The dataset is highly imbalanced with class 1 and ...
- 283
0
votes
0
answers
339
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Given a multiclass classifier, calculate one threshold per class to maximize recall under precision constraint
Given a classifier $f$, $N$ possible classes, and an input $x$, $f$ produces a class from $[1,..., N]$ and its matching confidence $[0,...,100]$.
Then I run $f$ on a large set of examples $X$, and I ...
- 53
0
votes
0
answers
103
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How to create an ROC model using three classes
I am trying to create a ROC plot based on response variable with three classes. I believe that is possible based on the answer to this question Here. In the answer provide in this question though, ...
- 177