On a whim I wanted to replace how I write code from
c("sigma[phi]", "sigma[epsilon]", "rho[phi]")
to this
c("σ[φ]", "σ[ε]", "ρ[φ]")
This caused some problems that made me give up. I can fix them (I think), but this post isn't about that.
I would just like to know what the general practice is regarding unicode characters in R files. Should they be avoided?