How can I impute missing value using MLE and EM?

 I could only estimate MLE, EM and MCMC.
For example: to estimate MLE: 
phat = mle(data) ; 
phat = mle(data,'distribution','norm');

How to impute missing data using MLE, EM and MCMC? would you please suggest some ideas to impute missing data using these methods. Thanks a lot :)