R codes

.csv files and R codes for the study "how good are final year veterinary students at recognising normal abdominal organs on ultrasound videos?".本研究《大四兽医学专业学生在超声视频中识别正常腹部器官的能力如何？》配套的逗号分隔值（Comma-Separated Values，.csv）文件与R语言代码。