Hi all,

I am using polr(). The resulting coefficients of first levels are always 0.

What to do if I wnat to get the coefficients of the last level 0.

For example, suppose x has 3 levels, 1, 2, 3

probit <- plor(y ~ x, data1, method='probit')

will get coefficients of level 2, 3 of x, but I want coefficients of level
1, 2

Thank you,
Tian

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