You can try setting init="adapt_diag". You cannot use the default "jitter+adapt_diag" here, as the test_value for the ordered RV needs to be ordered (and jitter would likely break that)
You can try setting init="adapt_diag". You cannot use the default "jitter+adapt_diag" here, as the test_value for the ordered RV needs to be ordered (and jitter would likely break that)