szukiyu

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Thank you for your explanation. Does it mean that using alpha_[a/b]_0 and gamma_[a/b]_0 is not recommended ?

This error occured when I used 'alpha_a_0', 'alpha_b_0', 'gamma_a_0' and 'gamma_b_0' in a definition of model of HSMM. This error does't appear when I use 'alpha' and 'gamma'.

Update information The reason of this error is the trans_counts has negative value.(https://github.com/mattjj/pyhsmm/blob/master/pyhsmm/internals/transitions.py#L370)