Please stay on the mailing list.
There is no single roc curve for a 3 class problem. So what do you want
to plot?
On 07/20/2018 10:40 AM, serafim loukas wrote:
Hello Andy,
Thank you for your response.
What I want to do is to plot the average(mean) ROC across Folds for a
3-class case.
I have managed to do so for the binary case and I am trying to make it
work for the mutlti-class case but with no luck.
There is an example in the documentation
(http://scikit-learn.org/stable/auto_examples/model_selection/plot_roc_crossval.html)
for the binary case.
I want to do the same ( plot the mean ROC and the confidence interval
for my 3-class problem).
Here is also my SO question about this:
https://stackoverflow.com/questions/51442818/average-roc-curve-across-folds-for-multi-class-classification-case-in-sklearn with
some code included.
Best,
Makis
On 20 Jul 2018, at 16:34, Andreas Mueller <t3k...@gmail.com
<mailto:t3k...@gmail.com>> wrote:
Hi Makis.
What do you mean by a roc curve for multi-class?
You can have one curve per class using OVR or one curve per pair of
classes.
That doesn't need the OneVsRestClassifier, it's more a matter of
evaluation.
Cheers,
Andy
On 07/20/2018 05:35 AM, serafim loukas wrote:
Dear Scikit-learn community,
I have a 3 class classification problem and I would like to plot the
average ROC across Folds.
There is an example in scikit-learn website but only for binary
classification problems
(http://scikit-learn.org/stable/auto_examples/model_selection/plot_roc_crossval.html).
I want to do the same but in the case of 3 classes. I have tried to
use `clf = OneVsRestClassifier(LinearDiscriminantAnalysis())`but I
am having a hard time to make it work.
Any help would be appreciated,
Makis
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