Factor analysis is a multivariate statistical analysis method, which starts from the study of the internal correlation of variables and boils down some complex variables into several comprehensive factors.

Factor analysis uses multiple factors to describe the relationship before these indicators, that is to say, several variables with high correlation are classified into the same category, each variable becomes a factor, and a few factors reflect most of the information of the original data. SPSS can be used for factor analysis, including single factor analysis and double factor analysis. As for the chart, it should be analyzed in detail.