[R] geom_smooth

[CALUM POLWART]

+ geom_ribbon(stat = "smooth",
              se = TRUE,
              alpha = 0, # or, use fill = NA
              colour = "black",
              linetype = "dotted")

Does that work?



On Sat, 12 Aug 2023, 06:12 Rui Barradas, <ruipbarradas using sapo.pt> wrote:

> Às 05:17 de 12/08/2023, Thomas Subia via R-help escreveu:
> > Colleagues,
> >
> > Here is my reproducible code for a graph using geom_smooth
> > set.seed(55)
> > scatter_data <- tibble(x_var = runif(100, min = 0, max = 25)
> >                         ,y_var = log2(x_var) + rnorm(100))
> >
> > library(ggplot2)
> > library(cowplot)
> >
> > ggplot(scatter_data,aes(x=x_var,y=y_var))+
> >    geom_point()+
> >    geom_smooth(se=TRUE,fill="blue",color="black",linetype="dashed")+
> >    theme_cowplot()
> >
> > I'd like to add a black boundary around the shaded area. I suspect this
> can be done with geom_ribbon but I cannot figure this out. Some advice
> would be welcome.
> >
> > Thanks!
> >
> > Thomas Subia
> >
> > ______________________________________________
> > R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> Hello,
>
> Here is a solution. You ,ust access the computed variables, which you
> can with ?ggplot_build.
> Then pass them in the data argument.
>
>
>
> p <- ggplot(scatter_data,aes(x=x_var,y=y_var)) +
>    geom_point()+
>    geom_smooth(se=TRUE,fill="blue",color="black",linetype="dashed")+
>    theme_cowplot()
>
> # this is a data.frame, relevant columns are x,  ymin and ymax
> fit <- ggplot_build(p)$data[[2]]
>
> p +
>    geom_line(data = fit, aes(x, ymin), linetype = "dashed", linewidth = 1)
> +
>    geom_line(data = fit, aes(x, ymax), linetype = "dashed", linewidth = 1)
>
>
> Hope this helps,
>
> Rui Barradas
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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