Feature selection with KNN

Hello All,

I am trying to use feature selection with KNN classifier

fun1 = @(XT,yT,Xt,yt)... (sum((yt ~= knnclassify(Xt,XT,yT)))); [fs,history] = sequentialfs(fun1,XT,yT,'cv',c1,'options',opts,'direction','forward')

But, I am getting an error which says knn classify is not a valid function. Can you suggest any solution for that?

[Adam]

Is it on your path? It seems to need the Bioinformatics Toolbox, though you haven't added this to the Products list so I don't know if you have this toolbox or not?

Type:

which knnclassify

to see if it is on your path.