Dear Abdelmadjid, I suggest you specify what kind of data are you interested in. Besides, try to specify the important scenarios you are considering for your case study.
Your question is not very clear and may be if you could specify your question to any specific data that you considering for your case study. It would be good to have more clarity in your question
Thank you very much for the answers, I want temporal data - important time series - (such as climate data) where I will create gaps (null values) whose purpose to evaluate missing values