Hi Hong Tran, Hope you are doing fine!
After reading your question, I understand that you want to know about how to implement stepseq function of the u(-n) function. I assume that by stepseq function you mean the function mentioned in the answer of this: https://www.mathworks.com/matlabcentral/answers/12834-unsolved-function
The stepseq function in signal processing is used to generate a sequence of step signals. When used with the u(-n) unit step function, the stepseq function generates a signal that has a step response at specific time intervals. To use the stepseq function with the u(-n) function, you need to specify the desired step response times and the values of the signal at those times. For example:
t = [0, 1, 3, 5]; % time points where the signal will change value
y = [1, 2, 0, -1]; % signal values at the respective time points
x = stepseq(t,y,n) % generate the step signal
In this example, t is an array that contains the times when the signal will change values, y is an array that contains the signal values at those times, and n is the time axis. The stepseq function generates the signal x that changes value at the specified times in t and has the corresponding values in y.
Regards,
Raghav Bansal
