Code to calculate and graph incremental cost-effectiveness ratios

User-friendly R code to 1) identify dominated and extended dominated options 2) calculate incremental cost-effectiveness ratios 3) draw a graph on the cost effectiveness plane

本用户友好型R语言代码可实现以下三项功能：1）识别占优方案（dominated options）与扩展占优方案（extended dominated options）；2）计算增量成本效果比（incremental cost-effectiveness ratios）；3）在成本效果平面（cost effectiveness plane）上绘制图形。