As one is not supposed to thank another for a helpful answer, as it may be quite annoying if you just read the post, I decided to generally thank the people who work through the questions, as until now all the questions I had were solved here. It helped me a lot, but one can not upvote another as much as one sometimes maybe feels like. Some answers are extremely helpful and I've been struggling with a few for several days when I finally found a related question and answer here. So.. thanks.
Q&A for professional and enthusiast programmers
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for students, researchers and practitioners of computer science
Q&A for people studying math at any level and professionals in related fields
Q&A for active researchers, academics and students of physics