I am experiencing a problem implementing sequential feature selection

function misclass = PartLDA(XT,yT,Xt,yt) lda = fitcdiscr(XT,yT,'discrimType','pseudolinear'); %perform LDA ldaClass = resubPredict(lda); %prediction misclass=sum(ldaClass ~= yT); %calculate missclassification rate end

[fs,history] = sequentialfs(@PartLDA,X,Y,'cv',C,'options',opts,'direction',direction) Error using sequentialfs (line 345) All input arguments must be tables.

Error in Untitled22 (line 84) [fs,history] = sequentialfs(@PartLDA,X,Y,'cv',C,'options',opts,'direction',direction)