双标图

双标图（Biplots）是一类统计学的统计图形。双标图可以同时把抽样和资料矩阵变量中的数据用图表表示出来。抽样样本可以用向量、线性轴和非线性轨迹表达。在类别变量的案例中，类别水平点（category level points）可以用来代表其类别变量的水平值。一类广义的双标图可以适用呈现序数标量和区间标量。

相关资料

Gabriel, K.R. The biplot graphic display of matrices with application to principal component analysis. Biometrika. 1971, 58 (3): 453–467.
Gower, J.C., Hand, D.J, 1996. Biplots. Chapman & Hall, London, UK. ISBN 0412716305
Yan, W., Kang, M.S. 2003. GGE Biplot Analysis. CRC Press, Boca Raton, FL. ISBN 0849313384
Vicente-Villardón, J.L.; Galindo M.P., Blázquez-Zaballos, A. (2006). Logistic Biplots. In: Multiple correspondence analysis and related methods. Greenacre M.; Blasius, J. (Eds) Chapman & Hall/CRC Press. Boca de Raton. USA. 608 p. ISBN 1584886285
Demey JR, JL Vicente-Villardón, MP Galindo-Villardón, AY Zambrano. 2008. Identifying molecular markers associated with classification of genotypes by External Logistic Biplots. Bioinformatics. 24(24):2832-2838