This is beautiful. Thanks!
G
-----Original Message-----
From: Rui Barradas <ruipbarra...@sapo.pt>
Sent: Thursday, February 18, 2021 2:10 PM
To: Izmirlian, Grant (NIH/NCI) [E] <izmir...@mail.nih.gov>; r-help@r-project.org
Subject: Re: [R] New line in caption with math symbols embedded in expression
(paste(
Hello,
First of all the plotmath in your code doesn't need paste, expression alone
will do it.
I am not sure that the following is what you want. I create the caption
beforehand, in order to make the plotting code simpler.
The asterisks/tildes make less/more space between the text line's elements.
e <- expression(
atop(
P * "(" * FDP ~ ">" ~ alpha * ") " ~
"for 'FDR' and 'Auto' FDP control method, vs '" *
m * "' at levels of 'eff size' (col) and '" *
p[1] * "' (row)" ~ "and",
"a new line" ~
bar(x) == sum(frac(x[i], n), i==1, n)
)
)
p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) +
geom_line(aes(y=Y.p))
p <- p + labs(caption = e)
p <- p + theme(plot.caption = element_text(hjust = 0))
p
Hope this helps,
Rui Barradas
Às 17:37 de 18/02/21, Izmirlian, Grant (NIH/NCI) [E] via R-help escreveu:
> ## I am using ggplot and trying to produce a caption containing math symbols.
> I need to
> ## add a second line. I did a fair amount of googling for answers. This one
> seemed like
> ## it would answer my question as it is nearly exactly my problem, except
> there is only
> ## one argument to the paste function. Note that my example is a complete
> minimal
> ## example, just a scatterplot with a line, and the caption content seems to
> not have
> ## anything to do with the plot. That is of course, intentional.
> ##
> ##
> https://stackoverflow.com/questions/13223846/ggplot2-two-line-label-with-expression
>
> library(ggplot2)
> X <- 10*runif(100)
> Y <- 2*X + rnorm(100, sd=2)
> fit <- lm(Y~X)
> Y.p <- predict(fit, newdata=data.frame(X=X))
> DAT <- data.frame(X=X)
>
> ## without a newline
> p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p))
> p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ",
> "for 'FDR' and 'Auto' FDP control method, vs '", m,
> "' at levels of 'eff size' (col) and '", p[1], "'
> (row)")))
> p <- p + theme(plot.caption = element_text(hjust = 0))
>
> ## newline, method 1, just add a new component of paste containing "\n"
> somewhere in the middle
> p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p))
> p <- p + labs(caption=expression(paste(P,"(",FDP,">", alpha,") ",
> "for 'FDR' and 'Auto' FDP control method, vs '", m,
> "' at levels of 'eff size' (col) and '", p[1], "'
> (row)",
> "and \n a new line")))
> p <- p + theme(plot.caption = element_text(hjust = 0))
>
> ## doesn't work because the newline affects only the last component of paste.
> It looks like new line
> ## works if the line is long enough, but the newline character is being
> parsed until the individual
> ## arguments to paste are parsed for math symbols but prior to pasting the
> components together. prior
> ## to pasting all arguments. I can't imagine why this would be the desired
> behavior. When the value of a
> ## caption argument is expression(paste(s1, s2, s3, ...)) then parsing for a
> newline character should
> ## occur after the components are pasted together, right?
>
> ## newline, method 2, enclose paste in another paste and add the new line as
> the second argument of the
> ## outer paste
> p <- ggplot(data=DAT, aes(x=X)) + geom_point(aes(y=Y)) + geom_line(aes(y=Y.p))
> p <- p + labs(caption=expression(paste(paste(P,"(",FDP,">", alpha,") ",
> "for 'FDR' and 'Auto' FDP control method, vs '", m,
> "' at levels of 'eff size' (col) and '", p[1], "'
> (row)"),
> "and \n a new line")))
> p <- p + theme(plot.caption = element_text(hjust = 0))
>
> ## which has the same behavior
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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 http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
______________________________________________
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 http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
