运用r语言构造有效前沿的步骤大致可按照获取数据、将数据加工处理为收益率矩阵、以收益率矩阵为输入计算得到有效前沿这三个步骤来完成。(The steps of using R language to construct an effective frontier can be achieved in three steps: data acquisition, data processing as yield matrix, and yield matrix as input.)