R superheat package heatmaps: change bottom axis labels font size

Question

I want to increase the bottom axis labels size of a heatmap created by the superheat package in R.

According to the vignette, this could be done via the bottom.label.size parameter. However, this doesn't change the font size for me (see RSession below), but only changes the margin of the box in which the label is written:

library(dplyr)
library(superheat)

matrix(1:9, ncol = 3) %>% superheat(bottom.label.size = 0.1)

matrix(1:9, ncol = 3) %>% superheat(bottom.label.size = 0.05)

Does anyone know how to control this? Is this a bug or am I missing something?

RSession info:

R version 3.3.2 (2016-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252    LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                           LC_TIME=English_United States.1252    

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

other attached packages:
[1] superheat_0.1.0 dplyr_0.5.0    

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.8      digest_0.6.11    assertthat_0.1   grid_3.3.2       R6_2.2.0         plyr_1.8.4      
 [7] gtable_0.2.0     DBI_0.5-1        magrittr_1.5     scales_0.4.1     ggplot2_2.2.1    lazyeval_0.2.0  
[13] labeling_0.3     tools_3.3.2      munsell_0.4.3    colorspace_1.3-2 tibble_1.2

Answer 1

matrix(1:9, ncol = 3) %>% superheat(bottom.label.size = 0.1, bottom.label.text.size = 10)