*Vertices 4
1 "中华血液学杂志" 0.0 0.0 0.0 x_fact 0.396825 y_fact 16.865079
2 "中华检验医学杂志" 0.0 0.0 0.0 x_fact 8.531746 y_fact 41.666667
3 "临床检验杂志" 0.0 0.0 0.0 x_fact 6.547619 y_fact 22.023810
4 "上海医学检验杂志" 0.0 0.0 0.0 x_fact 11.309524 y_fact 19.444444
*Matrix 
0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.311316 0.641142 
0.000000 0.311316 0.000000 0.494936 
0.000000 0.641142 0.494936 0.000000