1D dct equation implementation

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Urmila 2014-4-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/124681-1d-dct-equation-implementation

i have written a code to implent 1D dct formula. but the results are not matching with result of inbuilt function 'dct' for the same input data. can anyone help me to solve the problem.here is the code

clc;
pi=3.14;
arr=[8 8 8 8 8 8 8 8];
for k=1:8
      temp=0;
      DCT(k)=0;
      for i=1:8
          if k==1
              c=1/sqrt(8);
          else 
              c=sqrt(2/8);
              temp=temp+(arr(i)*cos((2*i+1)*k*(pi)/16));
          end
      end
      DCT(k)=c*temp;
      display(DCT(k))
  end