To generate a Single dimension array depending on the reduced order number

Hi all, I want to generate a single dimension matrix array depending on the reduced order in Order Reduction.

for example if the reduced order is 1, then the output should be like this R = 1 if the reduced order is 2, then the output should be like this R = [1 0] if the reduced order is 3, then the output should be like this R = [1 0 0] and so on...

Can anyone help me out?

Thanks in advance.