I got this problem with Rstudio, the plot labels are replaced by squares with 4 numbers inside.
Anyone has some idea what caused this trouble? I tried to re-create conda env and install rstudio, not working. And I got no such issue if i use basic R.
Thanks in advance
update 28.07.2020:
I tried to install rstudio via conda for a new account, the issue reproduced.
I tried to install rstudio via conda on a second PC, the issue persisted.
I tried to install an older version of rstudio via conda, and conda went to forever "solving environment".
I think it might be an issue of conda recipie....
update 29.07.2020 :
Problem solved by specifying the font family in plot function
plot(1,2,family="Times New Roman")
But the R default font
plot(1,2,family="mono")
plot(1,2,family="sans")
reproduce the same issue. It seems like conda caused R unloaded default font.