A warning message in stan_clogit

When running the Bayesian conditional logistic regression model using stan_clogit, I always got this error message (see below). But it seems that the analysis still went quite well. I don’t understand this error, but it seems that it does not influence the calculation.

Warning in model.matrix.default(mt, mf, contrasts) :
non-list contrasts argument ignored

Using the dataset ‘infert’ as an example, the code used is as below:

post <- stan_clogit(case ~ spontaneous + induced,
                    data = infert[order(infert$stratum), ], # order necessary
                    strata = stratum, QR = TRUE,
                    cores = 2, seed = 12345)

This is an rstanarm question, so I moved to rstanarm group. I’m afraid I don’t know anything about how rstanarm works.

1 Like

Sorry for this, and thanks for moving it!