Feature Selection using Correlation-based method

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Nina Perf
Nina Perf 2021-12-9
编辑： Nina Perf 2022-3-16
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!

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采纳的回答

yanqi liu
yanqi liu 2021-12-30
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))
  2 个评论
Nina Perf
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
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))

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