DEMO

Please input your R program below: (You CANNOT enter banned R functions)    Examples: 1.Simple: x = c(12,13,14,15,16) sum(x) mean(x) 2.You can show R plot(s) as the following example:     (You MUST use the bitmap and dev.off functions to generate a plot)     (Graphic file format can be jpg or png) x = c(12,13,14,12,12) y = c(7,5,34,2,42) # first plot jpeg(file="test1.jpg") hist(x,col=2) dev.off() # second plot jpeg(file="test2.png") plot(x,y) dev.off()