R help - Feb 2024 - gathering denominator under frac

Hi friends - I'm plotting a ratio of bicarbonates i ggplot2 and

ylab(expression(paste(frac("additive BIC","true BIC"))))
worked OK - but
now I have been asked to put the chemistry instead - so I wrote

 ?ylab(expression(paste(frac("additive",HCO[3]^"-","true",HCO[3]^"-"))))
- and frac saw that as additive = numerator and HCO3- = denominator and 
the rest was ignored-

So how do I make frac ignore the first ","? and print the fraction as
I
want?


All best wishes
Troels

?s 10:01 de 02/02/2024, Troels Ring escreveu:
> Hi friends - I'm plotting a ratio of bicarbonates i ggplot2 and
> 
> ylab(expression(paste(frac("additive BIC","true
BIC")))) worked OK - but
> now I have been asked to put the chemistry instead - so I wrote
> 
> 
?ylab(expression(paste(frac("additive",HCO[3]^"-","true",HCO[3]^"-"))))
> - and frac saw that as additive = numerator and HCO3- = denominator and 
> the rest was ignored-
> 
> So how do I make frac ignore the first ","? and print the
fraction as I
> want?
> 
> 
> All best wishes
> Troels
> 
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Hello,

This seems to work. Instead of separating the two numerator strings with 
a comma, separate them with a tilde. The same goes for the denominator.
And there is no need for double quotes around "additive" and
"true".


library(ggplot2)

g <- ggplot(iris, aes(Sepal.Length, Sepal.Width, color = Species)) +
   geom_point()

g + ylab(expression(paste(frac(
   additive~HCO[3]^"-",
   true~HCO[3]^"-"
))))



Hope this helps,

Rui Barradas


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