[R] overlay shaded area in base r plot

[ani jaya]

Thank you very much for the help. Turn out I can use 'density' to
differentiate the overlaid area.

On Tue, Sep 19, 2023, 16:16 Ivan Krylov <krylov.r00t using gmail.com> wrote:

> В Tue, 19 Sep 2023 13:21:08 +0900
> ani jaya <gaaauul using gmail.com> пишет:
>
> >
> polygon(c(1:20,20:1),c(mean1[1:20]+sd1[1:20],mean1[20:1]),col="lightblue")
> >
> polygon(c(1:20,20:1),c(mean1[1:20]-sd1[1:20],mean1[20:1]),col="lightblue")
> >
> polygon(c(1:20,20:1),c(mean2[1:20]+sd2[1:20],mean2[20:1]),col="lightyellow")
> >
> polygon(c(1:20,20:1),c(mean2[1:20]-sd2[1:20],mean2[20:1]),col="lightyellow")
>
> If you want the areas to overlap, try using a transparent colour. For
> example, "lightblue" is rgb(t(col2rgb("lightblue")), max = 255) →
> "#ADD8E6", so try setting the alpha (opacity) channel to something less
> than FF, e.g., "#ADD8E688".
>
> You can also use rgb(t(col2rgb("lightblue")), alpha = 128, max = 255)
> to generate hexadecimal colour strings for a given colour name and
> opacity value.
>
> --
> Best regards,
> Ivan
>

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