[R] Order of boxs in box plots

[David Doyle]

Hello,

I'm doing some box plots to look at the distributions of groundwater
results. It is plotting the well in the order of their IDs.  ie. MW1B then
MW3B then MW4A.....

 I would like to plot the wells in the order they are at the site such as MW1B
then WES-14-4-93 then ........  Is there a way I can control that??

My data and code are below.

Thank you for your time
David Doyle


MS <- read.table("http://www.doylesdartden.com/R/MS.csv", header=TRUE,
sep=",",)
MSAmmoniax <- c("Well", "AMMONIA")
MSAmmonia <- MS[MSAmmoniax]

plot(MSAmmonia, notch=TRUE, ylab = "Ammonia (mg/L)", cex =
1,col=(c("green","White","White","white","white","green")))
legend("topleft", inset=.002, title="Gradient",
       c("Up","Down"), fill=terrain.colors(2), horiz=TRUE, cex = 0.7,)
title(main="Lower Mudstone Ammonia Box Plots")

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