[pymvpa] Accuracy for distinguishing each class against all others

Brian Murphy brian.murphy at qub.ac.uk
Sun Apr 10 18:53:13 UTC 2016

Hi Jian,

this tutorial page includes an example of multiclass analysis, and down
the end it shows how to get the confusion matrix out of a (in this case
cross-validated) classifier with cvte.ca.stats.matrix. Note that you
have to tell your classifier to retain that information, with

best of luck,


On Sun, 2016-04-10 at 16:24 +0800, jian hou wrote:
> Hi all,
> I'd like to run a permutation test for a multi-class classification
> and I'm interested in the classification accuracy of each class rather
> than the overall accuracy. 
> Is there a way to get the null distribution of the accuracy of each
> class?
> Any suggestions? Thanks in advance.
> Best,
> Jian Hou
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Brian Murphy
Lecturer (Assistant Professor)
Knowledge and Data Engineering
School of EE Engineering and Computer Science
Queen's University Belfast

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