From: 8rino-Luca Pantani <ottorino-luca.pantani_at_unifi.it>

Date: Tue 06 Jul 2004 - 00:57:35 EST

library(lattice)

bwplot(Y~TREAT|LOCATION, data=mydframe)

#The panels are plotted in alphabetical order, but I would rather have

something like

bwplot(Y~TREAT|OM, data=mydframe)

*# i.e. the panels ordered by OM (Organic Matter) content
*

*#but with LOCATION written in the strip.
*

*#From
*

*#str(bwplot(Y~TREAT|OM, data=mydframe))
*

*#I can see that
*

*# $ index.cond :List of 1
*

*# ..$ : int [1:4] 1 2 3 4
*

# $ perm.cond : num 1

#so I tried

bwplot(Y~TREAT|LOCATION,

#and it seems to work, but without the darker tag for OM in the strips.

Any suggestion to simplify/improve the matter?

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Jul 06 01:03:35 2004

Date: Tue 06 Jul 2004 - 00:57:35 EST

Dear R users,

this is my first question to the list.

I hope it will be not a trivial one.

My problem is to change the order in which the panel are plotted in a
lattice/Trellis plot.

I've read the S-plus Trellis Graphics user manual, in which there is a
function called "reorder.factor",

that, as far as I can catch from ?xyplot, in the lattice package is
substituted by two others:

"index.cond" & "perm.cond"

here below the (fictitious) data

cbind.data.frame(TREAT=c(rep(c("YES", "NO"), each=12)),

OM=rep(rep(c(5, 1, 3, 7), each=3), 2), LOCATION=rep(rep(c("here5%OM", "there1%OM", "elsewhere3%OM", "overthere7%OM"), each=3), 2), Y=c(rnorm(3, mean=5),rnorm(3, mean=1),rnorm(3, mean=3),rnorm(3, mean=7), rnorm(3, mean=6),rnorm(3, mean=2),rnorm(3, mean=4),rnorm(3, mean=8)) )->mydframe

library(lattice)

bwplot(Y~TREAT|LOCATION, data=mydframe)

#The panels are plotted in alphabetical order, but I would rather have

something like

bwplot(Y~TREAT|OM, data=mydframe)

# $ perm.cond : num 1

#so I tried

bwplot(Y~TREAT|LOCATION,

data=mydframe, index.cond= list((1:4)[order(unique(mydframe$OM[order(mydframe$LOCATION)]))]) )

#and it seems to work, but without the darker tag for OM in the strips.

Now I have one perplexity and one question:

The last "list((1:4)[order(...." works fine, but it seems to me inelegant, too complicate

and not practical for plots withmore factors.

Any suggestion to simplify/improve the matter?

How can I keep the tags in the strips, still ordering the panels by OM?

Thanks in advance.

PS

The following lines are copied from ?xyplot
(I suspect that "order.cond" stands for "index.cond",
since I cannot find it in any other page of the lattice help, nor in the
general help)

The order in which the panels are drawn depends on the order

in which the conditioning variables are specified ('g1' varies fastest). Within a conditioning variable, the order depends on the order of the levels (which for factors is usually in alphabetical order). Both of these orders can be modified using the 'order.cond' and 'perm.cond' arguments, typically in the 'update' method.

Ottorino-Luca Pantani, Università di Firenze Dip. Scienza del Suolo e Nutrizione della Pianta

R-help@stat.math.ethz.ch mailing list

https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Jul 06 01:03:35 2004

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