*Vertices 4
1 "安徽农业科学" 0.0 0.0 0.0 x_fact 15.485564 y_fact 35.695538
2 "江苏农业学报" 0.0 0.0 0.0 x_fact 1.574803 y_fact 4.461942
3 "江苏农业科学" 0.0 0.0 0.0 x_fact 7.611549 y_fact 26.771654
4 "中国农学通报" 0.0 0.0 0.0 x_fact 4.461942 y_fact 33.070866
*Matrix 
0.000000 0.269441 0.310044 0.606418 
0.269441 0.000000 0.232949 0.350314 
0.310044 0.232949 0.000000 0.000000 
0.606418 0.350314 0.000000 0.000000