The 15 files from first to fifteen are all programmed by me to complete the specified content, and of course I also earned some money from it. It took two and a half months, and I was deeply touched. Some of the content was very challenging for me. There were obstacles in the writing process, but after the breakthrough, there will be a feeling of enlightenment. People always need to break through, even if we may not be able to see the future path at present, there will always be surprises or success waiting for us if we make more breakthroughs in things that are difficult for us. Success has never been achieved overnight, and the cost of time accounts for a large part, but we need to make the time pay off.
Currently contains factor analysis, principal component analysis, entropy weight method