바이올린 플롯 violin plot

boxplot보다 직관적인 분포 표현 방법

• matlab
  
  http://www.mathworks.com/matlabcentral/fileexchange/23661-violin-plots-for-plotting-multiple-distributions--distributionplot-m-
  
• R
  
  http://wsyang.com/2011/04/r-boxplot%EC%9D%98-%EC%83%88%EB%A1%9C%EC%9A%B4-%ED%98%95%ED%83%9C-violin-plot/