Semi-transparent Colors in R: Color Image as an Example | Yihui Xie | /en/2007/09/semi-transparent-colors-in-r-color-image-as-an-example/

Guest *Zaqfs* @ 2013-03-08 14:01:26 originally posted:

thx

访客 *Eva green* @ 2014-04-26 03:30:20 写道：

您好，非常感谢您的帮助。但是我在使用polygon绘制图形时如何改变颜色的透明度呢，使用了col=("green",alpha=0.5)但是好像不管用的样子，您知道怎么回事么

See ?rgb for how to generate semi-transparent colors and ?boxplot for how to use colors for boxes. Or use ggplot2 and specify the alpha argument.

Originally posted on 2012-06-16 04:03:41