how to implement fuzzy-KNN code to fault detection

Hi everybody!

please, I come to you once again to seek clarification.

indeed, I want to use the fuzzy-KNN algorithm to detect in a system. I have five categories of defects to detect, namely [No, O, S, PS, SD] corresponding to the values [1 2 3 4 5]

I wrote my algorithm and on this basis I tried a code that I find not correct,

I request your help to solve my problem please. if you can reread and bring your point of view, I will be happy

attached my code and my data.

thanks in advance