Error parsing pi

[sverek]

When using pi in for example plot(xlims=(0,pi)) the generated LaTeXcode is

xmin = {0}, xmax = {π = 3.1415926535897...}

Workaround:

fpi=Float64(pi)
plot(xlims=(0,fpi))

[tawheeler]

Right. If you enter π into the terminal you get:

julia> π
π = 3.1415926535897...

For something in PGFPlots to work it must show just a number. In this case the Irrational{:π} type renders additional, unsupported text.

PGFPlots does little to no type checking, leaving it free to user to use whatever they want (strings, Float, Int, custom types, etc.). Cases like this are a side effect of that freedom.