[R] How to rotate only one panel by 90 degrees in R plot?

[Luigi Marongiu]

I have seen that the only package that easily rotate the plot is
ggplot, so I ran:
```
library(ggplot2)
df = data.frame(MR = c(negative_mr, uncertain_mr, positive_mr),
FCN = c(negative_fcn, uncertain_fcn, positive_fcn))
p <- ggplot(df, aes(x=MR)) +
geom_density()
p + coord_flip()
```
Even in this case, the plot is correctly rotated, but I can't place it
in the allocated panel. ggplot2 simply overwrites the whole plot. This
means I need to do the whole thing in ggplot2 (would lattice have an
equivalent?) and split the plot into uneven panels with ggplot2.
Changing x into y is a clever approach, but it is not the same as
rotating a plot. But YES, that is exactly what I wanted to plot. Thank
you!

On Wed, Oct 13, 2021 at 1:17 AM Bert Gunter <bgunter.4567 using gmail.com> wrote:
>
> I don't know the gridGraphics package, and I haven't looked closely at what you are trying to do. But note that lattice functions construct grid "grobs" that can be saved and plotted in arbitrary, including rotated, viewports, using the print.trellis function. I frankly am pretty ignorant about such things, but this simple little example might give you some notion of how to proceed. You may also be able to do what you want with grid.layout() and pushing a suitably rotated viewport onto a layout. Others would have to advise on such details, if so.
>
> If I'm wrong and this is useless, just ignore without comment.
>
>
>
> dp <- densityplot(~y, main = "",
>                   xlab = "", ylab = "")
> grid.newpage()
> pushViewport(
>    viewport(width = unit(.5,"npc"),
>             height = unit(.3,"npc"),
>             angle = 270))
> print(dp, newp = FALSE,  ## this is the print.trellis method
>       panel.width = list(1,"npc"),
>       panel.height = list(1, "npc")
> )
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Tue, Oct 12, 2021 at 1:43 PM Luigi Marongiu <marongiu.luigi using gmail.com> wrote:
>>
>> Hello,
>> I would like to show a density plot of the Y axis. To do that, I would
>> like to split the plot into a panel 2/3 long and a density plot 1/3
>> long. The problem is that, since the density is on the Y axis, the
>> density plot should be rotated byb90 degrees. I tried with the package
>> gridGraphics but it rotates both panels.
>> ```
>> negative_y <- runif(50, 0, 0.099)
>> negative_x <- runif(50, 1, 40)
>> positive_y <- c(runif(30, 0.2, 0.5), runif(20, 0.4, 0.5))
>> positive_x <- c(runif(30, 25, 40), runif(20, 10, 25))
>> uncertain_y <- runif(10, 0.099, 0.2)
>> uncertain_x <- runif(10, 2, 40)
>> # plot on MR/FCN space
>> layout(matrix(c(1,2),nrow=1), widths=c(3,1)) # split panels unevenly
>> plot(negative_x, negative_y, ylim=c(0,0.5), xlim=c(0,41), cex=1.5,
>> xlab=expression(bold("X")),
>> ylab=expression(bold("Y")))
>> points(positive_x, positive_y, pch=16, cex=1.5)
>> points(uncertain_x, uncertain_y, pch=16, cex=1.5, col="grey")
>> legend("topleft",
>> legend = c("Positives", "Negatives", "Uncertains"),
>> pch = c(16, 1, 16), col=c("black", "black", "grey"), cex=0.8)
>> # plot density
>> plot(density(c(negative_y, uncertain_y, positive_y)),
>> yaxt="n", xaxt="n", main=NA, ylab=NA, xlab=NA)
>> library(gridGraphics)
>> grab_grob <- function(){
>> grid.echo()
>> grid.grab()
>> }
>> g <- grab_grob()
>> grid.newpage()
>> pushViewport(viewport(width=0.7,angle=270))
>> grid.draw(g)
>> ```
>> How can I rotate only the second panel? I tried to assign the second
>> plot to an object p and then call grid.draw(p), or to assign g to the
>> second plot, but they did not work...
>> Thanks
>>
>>
>> --
>> Best regards,
>> Luigi
>>
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-- 
Best regards,
Luigi