facet_grid style strip

[kongdd]

How can I make a ggplot facet_grid style strip when using levelplot?

[sciencepeak]

This is a good question. Why do you close the issue?
In my opinion, ggplot2's facet_grid style should be a compelling feature for the lattice package.

[m-jahn]

Maybe be more specific about the original question. From what I can see has lattice the same functionality as facet_grid, by using conditioning variables in combination with the layout argument. If you use two variables, it will arrange the number of rows and columns appropriately. If you want strips outside, you need useOuterStrips from latticeExtra, like this:

library(lattice)
library(dplyr)

# strips on top
xyplot(mpg ~ wt | gear * cyl, mtcars)

# strips on top and side
xyplot(mpg ~ wt | gear * cyl, mtcars) %>%
  latticeExtra::useOuterStrips()

[deepayan]

Yes, in hindsight, the strips should have gone on the right instead of left, but otherwise, I don't think there's much else that can be done.

[sciencepeak]

Thanks a lot for the amazing illustration of functionality of facet_grid() style in the plot.

I found that in latticeExtra::useOuterStrips() paramters, there is only strip.left. Could you please consider adding parameters such as strip.right, or even strip.top, strip.bottom, etc., if this is not a hard work? In facet_grid(), the strips can be at any side of the graph.

[deepayan]

That's not difficult in principle, but will involve some careful and tedious coding. I will reopen this issue so it stays on my TODO list.

[sciencepeak]

You are so nice. Thanks a lot for your contribution.