论文标题
一种从运行R代码派生信息的方法
A method for deriving information from running R code
论文作者
论文摘要
从运行的R脚本点击信息通常很有用。明显的用例包括监视资源（时间，内存）和记录的消耗。也许不太明显的情况包括跟踪R对象的变化，以调节单位测试的输出。在本文中，我们演示了一种方法，该方法将运行R脚本中的此类辅助信息收集和处理。我们的方法基于三个要素的组合。第一个元素是构建一种评估代码的自定义方法。第二个标记为\ emph {local masking}，它涉及暂时掩盖面向Auser的功能，因此称为其替代版本。我们标记的第三个元素\ emph {local side效果}。这是指掩码函数将信息导出到辅助信息流的情况下，而无需更改全球状态。结果是一种在Pure R中构建系统的方法，该方法使用户可以创建和控制信息的次要流，对其工作流程的影响最小，而没有全球副作用。
It is often useful to tap information from a running R script. Obvious use cases include monitoring the consumption of resources (time, memory) and logging. Perhaps less obvious cases include tracking changes in R objects orcollecting output of unit tests. In this paper we demonstrate an approach that abstracts collection and processing of such secondary information from the running R script. Our approach is based on a combination of three elements. The first element is to build a customized way to evaluate code. The second is labeled \emph{local masking} and it involves temporarily masking auser-facing function so an alternative version of it is called. The third element we label \emph{local side effect}. This refers to the fact that the masking function exports information to the secondary information flow without altering a global state. The result is a method for building systems in pure R that lets users create and control secondary flows of information with minimal impact on their workflow, and no global side effects.
