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Asked: 2026-06-10T07:41:08+00:00

I am using xyplot with inputs Y1 + Y2 ~ X . I would

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I am using xyplot with inputs Y1 + Y2 ~ X.
I would like to pass Y1 + Y2 as a list, rather than two explicit variables.
That way, I can write a generic xyplot function and pass it different values for a series of Ys.
Is that possible?

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1 Answer

  1. Editorial Team

    One strategy is to first paste together a character string representation of the formula, and then convert it to an object of class"formula", using as.formula(). Here’s an example using the mtcars dataframe that ships with base R.

    Y <- c("mpg", "cyl")
f <- as.formula(paste(paste(Y, collapse=" + "), " ~ disp"))
lattice::xyplot(f, data = mtcars)
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