Feature Selection using Correlation-based method

Question

0 个投票

Hi,

I want to use the Correlation-based Feature Selection to perform feature selection.

index = corrSel(X,Y)
[s,idx]= sort(mdl.FeatureWeights,'descend');

Do you know of any other functions in Matlab that do this?

Thanks!

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Answer 1

yanqi liu 2021-12-30

1 个投票

yes，sir，may be use the index to select feature，and then retrain model，such as

index=corrSel(feature,class)
selected_features=feature(:,index)
mdl=train(selected_features,labels(index))

Nina Perf 2022-1-3

Thank you for the feedback!

Can you please help me with an example on "how to plot the top 5 features" using the corrSel method?

yanqi liu 2022-1-4

yes，sir，use top 5 features，may be set

index=corrSel(feature,class)
index=index(1:5)
selected_features=feature(:,index)
mdl=train(selected_features,labels(index))