can someone please explain this code step by step

      clc

      clear all

      training0=xlsread('training set.xls');

      training1=xlsread('dataset.xlsx');

      zero=zeros(10,1);

      one=ones(10,1);

      group=[zero;one];

      test=TestFeatinputMRI;
      training=[training0;training1];
      KNN=fitcknn(training,group)

      Class = knnclassify(test,training,group)

[Rik]

(context of this question)

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