Supplementary Material for: The kinship2 R Package for Pedigree Data

Background: The kinship2 package is restructured from the previous kinship package. Existing features are now enhanced and new features added for handling pedigree objects. Methods: Pedigree plotting features have been updated to display features on complex pedigrees while adhering to pedigree plotting standards. Kinship matrices can now be calculated for the X chromosome. Other methods have been added to subset and trim pedigrees while maintaining the pedigree structure. Conclusion: We make the kinship2 package available for R on the Contributed R Archives Network (CRAN), where data management is built-in and other packages can use the pedigree object.背景：kinship2软件包由前代kinship软件包重构而成，针对谱系对象（pedigree）的处理功能既优化升级了既有特性，又新增了多项新功能。 方法：更新后的谱系绘图功能可在遵循谱系绘图标准的前提下，于复杂谱系上展示相关特征；新增了X染色体亲缘矩阵的计算能力；同时补充了可在保留谱系结构的前提下对谱系进行子集提取与修剪的其他方法。 结论：我们已将针对R语言的kinship2软件包发布至贡献式R存档网络（Contributed R Archives Network，简称CRAN），该软件包内置数据管理功能，且可供其他R软件包调用谱系对象。