kNN Classification problem. The test result is always the first label of training sample.

Hello everyone I've a training set of 17 observations. The dimensions of training and testing data are

• X= 17x7660 (features, each row is feats from each obs)
• Y= 17 x 1 (label for each row)and Test feat isZ=1x7660I'm using knnclassify and everytime i run different test samples, I always end up with same prediction result; which is the first column of training data (Y(1,:)) |...

1. Im not sure if my training has an error..or where the problem is.. urgently waiting for help|