poLCA conditional probabilities to classify new responses

Hi all

I wonder if anybody had developed a formula to apply the output of the poLCA analysis (the conditional item response probabilities for obtained classes) to estimate the membership probability to each of the classes (segments). I'm not an expert in mathematical formulas, I have knowledge in psycometry but it is not enough. Maybe is a simple solution. Any advice will be greatly appreciated.

PD: I know this task is performed using the polca.posterior command but I wonder if there is another way, writing a formula, so anyone can classify new individuals without using R

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