R Graphics I 一个例子 plot(mtcarsswt,mtcars$mpg) abline(lm(mtcarssmpg mtcarsswt)) title("Regression of MPG on Weight") Regression of MPG on Weight 200000m 00 000000 0 P00000 0008° 9 见RiA课本44页 2 3 4 5 mtcarsSwtR Graphics I 一个例子 ᥠRiA᧞๜44ᶭ