On Tuesday 09 September 2003 04:49, Marc Mamin wrote:
> Hallo,
>
> I'd like to add grid lines to a lattice graph having 2 series of Y data.
>
> See these 2 examples:
>
>
>
> data(iris)
>
> [1]
> xyplot(Sepal.Length + Sepal.Width ~ Petal.Length ,
> data = iris, allow.multiple = TRUE, scales = "same",type="l",
> )
>
>
> [2]
> xyplot(Sepal.Length + Sepal.Width ~ Petal.Length ,
> data = iris, allow.multiple = TRUE, scales = "same",type="l",
> panel = function(x, y) {
> panel.grid(h=2, v= 3)
> panel.xyplot(x, y)
> }
> )
>
>
> Question: is it possible to keep all the formats of example [1] (colors,
> type="l", ...), and just add the grids appearing in example 2.
> Moreover I'd like to choose the color of the grid...
Something like this should work:
xyplot(Sepal.Length + Sepal.Width ~ Petal.Length ,
data = iris, allow.multiple = TRUE, scales = "same",type="l",
panel = function(...) {
panel.grid(h=2, v= 3, col="blue")
panel.xyplot(...)
}
)
Deepayan
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