[R] need help with understanding coxph encoding

[summer]

Thank you. The factor is useful.
What if I did not factor it,and the x is listed as 2 2 1 1 1 1 2 2  2 and so
on. How would I know the HR for coxph is group2/group1 or group1/group2? I
understand it's just inverse but how can I identify the exact HR?

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