[R] lattice densityplot with weights

[Bert Gunter]

Unless I misunderstand...

See ?panel.densityplot

Lattice functions do their work through a host of panel functions,
typically passing their ... arguments to the panel functions.
panel.densityplot has a weights argument.

Cheers,
Bert




On Fri, Sep 29, 2023 at 3:32 AM Naresh Gurbuxani <
naresh_gurbuxani using hotmail.com> wrote:

>
> density() function in R accepts weights as an input.  Using this
> function, one can calculate density and plot it.  Is it possible to
> combined these two operations in lattice densityplot()?
>
> mydf <- data.frame(name = "A", x = seq(-2.9, 2.9, by = 0.2), wt =
> diff(pnorm(seq(-3, 3, by = 0.2))))
> mydf <- rbind(mydf, data.frame(name = "B", x = mydf$x + 0.5, wt =
> mydf$wt))
> with(subset(mydf, name == "A"), density(x, weights = wt / sum(wt)) |>
> plot(xlim = c(-3, 3.5), xlab = "", main = "Density Plots"))
> with(subset(mydf, name == "B"), density(x, weights = wt / sum(wt)) |>
> lines(lty = 2, col = 2))
> grid()
> legend("topright", legend = c("A", "B"), col = c(1, 2), lty = c(1, 2),
> bty = "n")
>
> # I want to do something like this:
> # densityplot(~ x, weights = wt, groups = name, data = mydf, type = c("l",
> "g"))
>
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