Panel order in lattice with xyplot

I am a new user of R  and I am going very slow?.

Never mind, R has s a steep (or, more accurately, shallow) learning curve.

I am using lattice and am trying to draw a multipanel figure. The problems
are that I am not able to find out how to: 
1. Set the order of the panels.
2. Set the order of the x axes.

For an easy, but restricted, way to change the order of the panels, see
as.table in the documentation of xyplot. To change the order panels with
categorical variable, it is easiest to change the order of the categories;
see, for example, "reorder".

Benthic<- read.table(file="WWTP 1 WICK 5.txt",header = TRUE)
.. Code removed

Your example is fine, with the exception that other people cannot reproduce
it because they do not have the data file. So always include dummy data for
a detailed reply

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