Issue with reduce with named columns in JuliaDB

[zlewko]

I'm trying to use OnlineStats with JuliaDB am unable to get it working with named columns. I'm not sure if this is an issue with OnlineStats or JuliaDB or just isn't expected to work this way...

using JuliaDB
using OnlineStats

t1 = table(rand(10), rand(10))
reduce(2Mean(),t1) 
#no error


t2 = table(rand(10), rand(10), names=[:a,:b])
reduce(2Mean(),t2) 
#Error:  The input for Group is a Union{NamedTuple{names,Tuple{Number,Number}}, Tuple{Number,Number}, AbstractArray{#s28,1} where #s28<:Number} where names.  Found Float64.```

[joshday]

Ah, not sure how I never came across this myself. Looks like it has to do with some named tuple strangeness. I'll try to fix it.

julia> (1,2) isa Tuple{Number, Number}
true

julia> (a=1,b=2) isa NamedTuple{names, Tuple{Number,Number}} where names
false

[joshday]

Fixed with OnlineStatsBase master:

julia> t2 = table(rand(10), rand(10), names=[:a,:b]);

julia> reduce(2Mean(),t2)
Group
  ├── Mean: n=10 | value=0.550865
  └── Mean: n=10 | value=0.294161

[zlewko]

Thanks! It's working for me now.