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The code can be written by simply modifying the code to add two discrete signals which I have already discussed in my previous video. Check this video to understand, how to add 2 discrete signals in MATLAB: Signal addition in MATALB Step 1: Here, you don't need 2 inputs, take only one input signal. Step2: Take the second signal as a flipped version of the input signal(i.e. if you define x as my first input signal then the second signal is y=fliplr(x)) Step3: If my first signal has a time sample range as n1 then for the second signal, the range will be n2=-fliplr(n1); (this is the concept of flipping a signal in MatLab or Time Reversal, this also I have covered in my previous video) Check the video to understand, how to do time reversal in MATLAB: Time reversal of a sequence (DSP) Step4: Now write the same code as discussed in Addition of 2 signals in MATLAB Step5: Now instead of adding dirrectly , to calculate the even part use the formula--z3=(z1+z2)/2 & to calculate the odd part use the formula--z=(z1-z2)/2 Step6: Plot that waveforms In this video I have shown , even and odd decomposition of u(n)-u(n-10) signal MATLAB Program: Even and Odd Decomposition of a Signal in MATLAB