Hello list,

i am trying to plot a continous variable y against a "date" variable, both 
in one dataframe named "df", using a code like this

library(lattice)
plot1<-xyplot(y~date, data=df, type="b")

"date" is of class "Date", of course, format="%d.%m.%Y", and spans two 
calendar years. The problem is that the x-axis is labeled with only one 
tick mark corresponding to the year with century (%Y) of the second 
calendar year.

Is there a way to define the increment of the x-axis tick marks?

Cheers

Henning    
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