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Is there an option to get a nice non italic greek letter (in my case "mu") in the axis label in R with ggplot and sans-serif applied?

This is how far I came: Overview of the hole plot

Zoom of the output: Zoom picture of the mu

Left "mu": If I look closely it doesn't fit properly:

  • wrong font (I could deal with that)
  • wrong font size

Right "mu":

  • Just perfect, but I need it to be non-italic as it should be a unit

(Hint: In R-Studio preview window it is shown non-italic, but I need the PDF to be correct.)

Here the R-code:

library("ggplot2")

x <- seq(0,10,1)
y <- seq(0,1,0.1)
Data <- data.frame(x,y)

myPlot <- ggplot (Data, aes(x = x,y = y)) + 
geom_point() +
scale_x_continuous(expression(paste("[", mu, "m] and [µm]")))+
theme(text = element_text(size=12, family="sans")) +
theme_minimal(); myPlot

ggsave("Test.pdf", width = 16, height = 8, units ="cm", dpi = 1200)

Update I: Output of the sessionInfo() as it only appears on MacOs and not on Windows.

sessionInfo()
> R version 3.5.1 (2018-07-02)
> Platform: x86_64-apple-darwin15.6.0 (64-bit)
> Running under: macOS High Sierra 10.13.6

> Matrix products: default
> BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
> LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib

> locale:
> [1] de_DE.UTF-8/de_DE.UTF-8/de_DE.UTF-8/C/de_DE.UTF-8/de_DE.UTF-8

> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base     

> other attached packages:
> [1] ggplot2_3.1.0

> loaded via a namespace (and not attached):
> [1] Rcpp_0.12.19     withr_2.1.2      assertthat_0.2.0 crayon_1.3.4     dplyr_0.7.7      R6_2.3.0        
>  [7] grid_3.5.1       plyr_1.8.4       gtable_0.2.0     magrittr_1.5     scales_1.0.0     pillar_1.3.0    
> [13] rlang_0.3.0.1    lazyeval_0.2.1   rstudioapi_0.8   bindrcpp_0.2.2   labeling_0.3     tools_3.5.1     
> [19] glue_1.3.0       purrr_0.2.5      munsell_0.5.0    yaml_2.2.0       compiler_3.5.1   pkgconfig_2.0.2 
> [25] colorspace_1.3-2 tidyselect_0.2.5 bindr_0.1.1      tibble_1.4.2
KLJ
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1 Answers1

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I am using Mac OS and had the same issue. I got around it by saving my image as .eps file. Opening the .eps in preview still showed the units to be italic, but when opening in another image editor the units are non-italic.

mi2
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