Knowing code clones (similar code fragments) is helpful in software maintenance and re-engineering. As clone detectors return huge numbers of clones, visualization techniques have been proposed to make cloning information more comprehensible and useful for programmers. We present a mapping study of clone visualization techniques, classifying visualizations in respect to the user goals to be achieved by means of clone visualizations and relevant clone-related information needs. Our mapping study will aid tool users in selecting clone visualization tools suitable for the task at hand, tool vendors in improving capabilities of their tools, and researchers in identifying open problems in clone visualization research.

了解代码克隆（相似的代码片段）有助于软件维护和重新设计。随着克隆检测器返回大量克隆，已经提出了可视化技术以使克隆信息对程序员更易理解和有用。我们提出了克隆可视化技术的映射研究，通过克隆可视化和相关的克隆相关信息需求，根据要实现的用户目标对可视化进行分类。我们的制图研究将帮助工具用户选择适合当前任务的克隆可视化工具，帮助工具供应商提高工具的功能，并帮助研究人员识别克隆可视化研究中的未解决问题。