How can I set priors in Classification Learner with QDA

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Eugene Davis
Eugene Davis 2021-12-25
评论： Eugene Davis 2021-12-28
I am using Classifiaction Learner App to try out various classifiaction techniques. When I run QDA, I would like to set the priors to the default of 1/K (K groups) before I train. I do not see a way to do that.

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回答（1 个）

Shanmukha Voggu
Shanmukha Voggu 2021-12-28
Hi Eugene,
According to my knowledge, In Classification Learner App, it is not possible to set the number of groups in QDA(Quadratic Discriminant Analysis)
For greater flexibility, train a discriminant analysis model using fitcdiscr
As a workaround, QDA can be done using fitdiscr function along with KFold Name-Value Pair to randomly partition the data into k sets.
Refer to this for more information.
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Eugene Davis
Eugene Davis 2021-12-28
Thanks for the feedback. I have only two groups and that is fixed and compatible with Classification Learner. I want to set the prior probabilities for thoise groups. Now it may still be true that I need to call fitdisc. I would hope that custom priors can be added to the App.

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