[julia-users] Layered subplot does not work with categorical variables

[Christopher Fisher]

Hi all-

I'm having trouble creating a subplot with multiple layers when the 
variables are categorical.  Here is a stripped down version of my code.

df = DataFrame(Condition = repeat(["Condition 1","Condition 2"], inner = 
3), Block = repeat(["Block 1","Block 2", "Block 3"],outer = 2),y1 = 
rand(6), y2 = rand(6))


                plot(
                     Geom.subplot_grid(
                        layer(df,x = :Block,y = :y1,xgroup = :Condition,
                              Geom.line, 
Theme(default_color=colorant"red")),
                        layer(df,x = :Block,y = :y2,xgroup = :Condition,
                              Geom.line, 
Theme(default_color=colorant"blue"))))



This generates the following error:

ethodError: no method matching isfinite(::String)
Closest candidates are:
isfinite(!Matched::Float16) at float16.jl:119
isfinite(!Matched::BigFloat) at mpfr.jl:799
isfinite(!Matched::DataArrays.NAtype) at 
/home/dfish/.julia/v0.5/DataArrays/src/predicates.jl:9


However, if I use Block repeat([1,2,3],outer = 2), the code works. Is there 
any way around this? 

Thanks,

Chris