*Vertices 18
1 "西北植物学报" 0.0 0.0 0.0 x_fact 2.466972 y_fact 5.028310
2 "植物学通报" 0.0 0.0 0.0 x_fact 1.833378 y_fact 2.183877
3 "干旱地区农业研究" 0.0 0.0 0.0 x_fact 1.159342 y_fact 2.426530
4 "甘肃农业大学学报" 0.0 0.0 0.0 x_fact 0.417902 y_fact 1.995147
5 "西南农业学报" 0.0 0.0 0.0 x_fact 0.943651 y_fact 1.779455
6 "种子" 0.0 0.0 0.0 x_fact 0.984093 y_fact 3.060124
7 "中国草地" 0.0 0.0 0.0 x_fact 5.324885 y_fact 6.511189
8 "草业科学" 0.0 0.0 0.0 x_fact 4.772176 y_fact 8.641143
9 "家畜生态" 0.0 0.0 0.0 x_fact 0.053923 y_fact 0.862766
10 "吉林农业大学学报" 0.0 0.0 0.0 x_fact 0.552710 y_fact 1.712052
11 "草地学报" 0.0 0.0 0.0 x_fact 2.615260 y_fact 3.612834
12 "草业学报" 0.0 0.0 0.0 x_fact 4.044217 y_fact 8.762470
13 "草原与草坪" 0.0 0.0 0.0 x_fact 1.240226 y_fact 2.129954
14 "中国农学通报" 0.0 0.0 0.0 x_fact 0.687517 y_fact 1.334592
15 "生态学报" 0.0 0.0 0.0 x_fact 9.166891 y_fact 19.668374
16 "应用生态学报" 0.0 0.0 0.0 x_fact 8.411971 y_fact 23.901321
17 "生态学杂志" 0.0 0.0 0.0 x_fact 3.868967 y_fact 5.378808
18 "中国人口资源与环境" 0.0 0.0 0.0 x_fact 0.350499 y_fact 1.011054
*Matrix 
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