[R] Again, about boxplot

[Adaikalavan Ramasamy]

I just changed the 'at' argument and added an 'xlim' option.

   boxplot(len ~ dose, data = ToothGrowth,
           boxwex = 0.25, at = 1:3,
           subset = which(supp == "VC"), col = "yellow",
           main = "Guinea Pigs' Tooth Growth",
           xlab = "Vitamin C dose mg",
           ylab = "tooth length", xlim=c(1, 6), ylim=c(0, 35), yaxs="i")

   abline(v=3.5)

   boxplot(len ~ dose, data = ToothGrowth, add = TRUE,
           boxwex = 0.25, at = 1:3 + 3,
           subset = which(supp == "OJ"), col = "orange")

   legend("bottomright", c("Ascorbic acid", "Orange juice"),
          fill = c("yellow", "orange"))

Regards, Adai



cathelf wrote:
> Thank you for your guys reply for my previous question. But I got one more
> question about the boxplot. With the code in the R-help:
> 
> boxplot(len ~ dose, data = ToothGrowth,
>         boxwex = 0.25, at = 1:3 - 0.2,
>         subset = supp == "VC", col = "yellow",
>         main = "Guinea Pigs' Tooth Growth",
>         xlab = "Vitamin C dose mg",
>         ylab = "tooth length", ylim = c(0, 35), yaxs = "i")
> boxplot(len ~ dose, data = ToothGrowth, add = TRUE,
>         boxwex = 0.25, at = 1:3 + 0.2,
>         subset = supp == "OJ", col = "orange")
> legend(2, 9, c("Ascorbic acid", "Orange juice"),
>        fill = c("yellow", "orange"))
> 
> I got 6 boxplots, which is ordered as "0.5, 0.5, 1, 1, 2, 2"
> How can I reorder the 6 boxplots as "0.5, 1, 2,  0.5, 1, 2"?
> 
> Thank you very much!