*Vertices 4
1 "遗传学报" 0.0 0.0 0.0 x_fact 2.430556 y_fact 9.583333
2 "中国水稻科学" 0.0 0.0 0.0 x_fact 8.194444 y_fact 17.013889
3 "中国农业科学" 0.0 0.0 0.0 x_fact 17.569444 y_fact 35.000000
4 "作物学报" 0.0 0.0 0.0 x_fact 18.750000 y_fact 38.402778
*Matrix 
0.000000 0.272857 0.355207 0.393512 
0.272857 0.000000 0.606849 0.671196 
0.355207 0.606849 0.000000 0.826993 
0.393512 0.671196 0.826993 0.000000