Susannalsy Liechi 谢谢谢谢!不常用ggplot,因为我的x轴和y轴不在一个数据里,画图要声明data,只能写一个data来源,所以我就老失败,一直用的plot(),但png()不带有dpi参数,所以出图分辨率比较低,有时就用origin画图了,学会了,谢谢大神!
nan.xiao 但png()不带有dpi参数 res The nominal resolution in ppi which will be recorded in the bitmap file, if a positive integer. Also used for units other than the default, and to convert points to pixels.