how can I do online Expectation–maximization algorithm?

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em algorithm is usually optimized iteratively between the expectation and the maximize the likelihood with the whole data. I want to use the em algorithm with a single sample or a mini-batch. And how to optimize in the expectation step and re-estimate parameters in the maximization step? [See here]https://stats.stackexchange.com/questions/373958/how-can-i-do-online-expectation-maximization-algorithm