Thank you, facets are good but I was looking for something that could
merge everything in a single plot. I found that I could create an
additional column, say M (merge), that accommodates two parameters
into one, for instance, `a + A`, `a + B` etc. By grouping for M, I can
kind of stratify the data...
On Sun, Jun 8, 2025 at 6:03 PM Rui Barradas <ruipbarra...@sapo.pt> wrote:
>
> Às 07:21 de 08/06/2025, Luigi Marongiu escreveu:
> > I would like to plot multivariate data with ggplot2. I have multiple
> > groups that I need to account for: I have the `x` and `y` values, but
> > the data must be stratified also by `w` and `z`. I can group by either
> > `w` or `z`, but how can I group for both simultaneously?
> > In essence, in the example below, the legend should have two columns
> > (A and B) and five rows (which are already there since the data is
> > stratified by w). There should be 10 colors.
> > How can I do that?
> > Thank you
> >
> >>>>>>>
> > ```
> > df = data.frame(x = c(rep(1,5), rep(2,5), rep(3,5), rep(4,5)),
> > w = rep(letters[1:5],4),
> > z = c(rep(LETTERS[1],10),
> > rep(LETTERS[2],10)),
> > y = rnorm(20),
> > stringsAsFactors = FALSE)
> > library(ggplot2)
> > ggplot(df, aes(x=x, y=y, colour=w, group=w)) +
> > geom_line(linewidth=2) +
> > ggtitle("A+B")
> > ggplot(df[df$z=="A",], aes(x=x, y=y, colour=w, group=w)) +
> > geom_line(linewidth=2) +
> > ggtitle("A")
> > ggplot(df[df$z=="B",], aes(x=x, y=y, colour=w, group=w)) +
> > geom_line(linewidth=2) +
> > ggtitle("B")
> > ```
> >
> > ______________________________________________
> > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> > https://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> Hello,
>
> You can use the 4th variable to define facets. Like this?
>
>
> ggplot(df, aes(x=x, y=y, colour=w)) +
> geom_line(linewidth=2) +
> facet_wrap(~ z, scales = "free_x") +
> ggtitle("A+B")
>
>
> Hope this helps,
>
> Rui Barradas
>
>
>
> --
> Este e-mail foi analisado pelo software antivírus AVG para verificar a
> presença de vírus.
> www.avg.com
--
Best regards,
Luigi
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
