R language uses cor function to calculate the correlation matrix for correlation analysis, uses corrgram package to visualize the correlation matrix, reorders rows and columns using principal componen

R Language use cor Function to calculate the correlation matrix for correlation analysis , Use corrgram Bag corrgram Function visualization correlation matrix 、 Rows and columns are reordered using principal component analysis 、 Use smooth fitting lines and confidence ellipses in the lower triangle , Use scatter in upper triangle 、 Diagonal contains minimum value