Using xyplot with Knitr (TexStudio), panels were created but no data points (when compiling using RStudio, everything is fine)

[Yi Tang]

Hi all,

I am pretty new to Knitr, and currently using TexStudio with knitr.

I found a weird problem: when I am trying to use xyplot, knitr can generate all the panels but the panels are empty. For example:

<<p2-1>>=
require(faraway)
require(nlme) 

data("attenu") 

head(attenu) 

require(lattice) 

xyplot(log(accel) ~ log(dist) | event, data = attenu, layout = c(6,4))
@

Then I get:

However, it should be (and can be generated in RStudio using Knitr, exact same codes):

Can anyone help me and explain why I got different plots in RStudio and TexStudio?

Thanks,

Yi