Ctree plot

HI everybody!

Has anybody figure out how would be possible to plot several ctree plots
beside each other?
I would really appreciate it
 My idea would be like this, but the par() function seem to be lower in
hierarchy
Thanks in advance
#########################################################
library(party)

mtree <- ctree(Species ~ ., data=iris)
sep.tree<-ctree(Sepal.Length ~ ., data=iris)

par(mfrow=c(1,2)) # Does not work
plot(mtree) 
plot(sep.tree) 




-----
Rodrigo Vargas G.
-----------------------------------------
Silviculture Institute
Freiburg University

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