*Vertices 8
1 "植物生理学通讯" 0.0 0.0 0.0 x_fact 0.795107 y_fact 5.688073
2 "中国农业科学" 0.0 0.0 0.0 x_fact 39.938838 y_fact 46.055046
3 "华北农学报" 0.0 0.0 0.0 x_fact 3.425076 y_fact 5.382263
4 "作物学报" 0.0 0.0 0.0 x_fact 8.256881 y_fact 18.348624
5 "作物杂志" 0.0 0.0 0.0 x_fact 2.752294 y_fact 3.241590
6 "吉林农业科学" 0.0 0.0 0.0 x_fact 1.651376 y_fact 3.669725
7 "江苏农业科学" 0.0 0.0 0.0 x_fact 1.162080 y_fact 4.464832
8 "玉米科学" 0.0 0.0 0.0 x_fact 5.932722 y_fact 13.149847
*Matrix 
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0.327592 0.645809 0.000000 0.696148 0.681770 0.290944 0.000000 0.378265 
0.000000 0.944851 0.696148 0.000000 0.919765 0.417346 0.000000 0.270653 
0.000000 0.890017 0.681770 0.919765 0.000000 0.383285 0.328102 0.463400 
0.000000 0.371388 0.290944 0.417346 0.383285 0.000000 0.000000 0.267370 
0.000000 0.000000 0.000000 0.000000 0.328102 0.000000 0.000000 0.000000 
0.000000 0.219904 0.378265 0.270653 0.463400 0.267370 0.000000 0.000000