Missing spaces in LaTeX expressions when plotting using latex2exp

[colinbousige]

Hello,

See original post here where the author of latex2exp tracked the issue to arise from the httpgd plot renderer.

When plotting using httpgd and latex2exp, LaTeX expressions are missing spaces and are distorted. Doing the same plot in the normal R png renderer yields the expected result.

To reproduce in a vanilla R terminal:

library(httpgd)
library(latex2exp)
hgd()
plot(TeX(r'($\alpha$ and also $\beta$)'))

yields this:

instead of this :

library(latex2exp)
plot(TeX(r'($\alpha$ and also $\beta$)'))

[nx10]

Hi!

Thanks for opening the issue.
I am very busy currently due to moving, but could you try to replicate the plot with svglite ( https://github.com/r-lib/svglite )?
Most of the font rendering code in httpgd is based on it.

[colinbousige]

Hi

And thanks for your answer !
It doesn't seem like I can reproduce the problem with svglite, though:

library(svglite)
library(latex2exp)

svglite("test.svg")
plot(TeX(r'($\alpha$ and also $\beta$)'), cex=4)
dev.off()

The result is OK:

[nx10]

Thanks! Definitely a bug in httpgd then. I will investigate as soon as I have a bit of free time.