You can download an orthogonal assistant, which can help you process data. The range and variance are all out. The larger the range, the more significant the influence of this factor on the experiment. Finding the best conditions from K 1, k2, k3 and supplementing a group of experiments should get the best results. . The experiment is over. You download a document, such as Examples of Orthogonal Experiment Application, and just follow it. It's not very difficult ~