Feature Selection using Correlation-based method

Hi,

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

I tried the https://www.mathworks.com/matlabcentral/fileexchange/72177-feature-selection however, it is not working

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

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

Thanks!

Answer 1

[yanqi liu]

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]

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]

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))