How to Histogram Unitful Units in Julia?

I am trying to figure out how to bin/histogram an array of data in Julia. I have an array of units from the Unitful.jl package and want to use Histogram from StatsBase to bin the data. The first error I got was an error saying there were no methods for log10 to use Unitful.FreeUnits so I wrote one. Now I get a dimensional error. I thought Unitful was just going to work with other stuff.. guess not. The following is where I am at.

using Unitful  using StatsBase    data = [rand()*100*1u"MHz" for x in 1:10000]    function Base.log10(x::Quantity{})      u = unit(x)      return log10(x.val)u  end    # eventually I want to define my bin width manually.. but this is a start.  fit(Histogram, data)    

ERROR

ERROR: DimensionError: 0.0 and 0.8237981449864736 MHz are not dimensionally compatible.  Stacktrace:   [1] _lt at /home/mcamp/.julia/packages/Unitful/1t88N/src/quantities.jl:274 [inlined]   [2] <(::Quantity{Float64,NoDims,Unitful.FreeUnits{(),NoDims,nothing}}, ::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}) at /home/mcamp/.julia/packages/Unitful/1t88N/src/quantities.jl:264   [3] <(::Int64, ::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}) at /home/mcamp/.julia/packages/Unitful/1t88N/src/quantities.jl:266   [4] <=(::Int64, ::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}) at ./operators.jl:326   [5] >=(::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}, ::Int64) at ./operators.jl:350   [6] histrange(::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}, ::Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}}, ::Int64, ::Symbol) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:51   [7] histrange(::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}, ::Int64, ::Symbol) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:39   [8] (::StatsBase.var"#127#128"{Symbol})(::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}, ::Int64) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:103   [9] map(::StatsBase.var"#127#128"{Symbol}, ::Tuple{Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}}, ::Tuple{Int64}) at ./tuple.jl:176   [10] histrange(::Tuple{Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}}, ::Tuple{Int64}, ::Symbol) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:102   [11] fit(::Type{Histogram{Int64,N,E} where E where N}, ::Tuple{Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}}; closed::Symbol, nbins::Int64) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:332   [12] fit(::Type{Histogram{Int64,N,E} where E where N}, ::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}; closed::Symbol, nbins::Int64) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:276   [13] fit(::Type{Histogram{Int64,N,E} where E where N}, ::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:276   [14] fit(::Type{Histogram}, ::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:383   [15] fit(::Type{Histogram}, ::Array{Quantity{Float64,𝐓^-1,Unitful.FreeUnits{(MHz,),𝐓^-1,nothing}},1}) at /home/mcamp/.julia/packages/StatsBase/EA8Mh/src/hist.jl:383   [16] top-level scope at REPL[183]:1   [17] run_repl(::REPL.AbstractREPL, ::Any) at /build/julia/src/julia-1.5.3/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:288  

https://stackoverflow.com/questions/65409182/how-to-histogram-unitful-units-in-julia December 22, 2020 at 08:58PM