无法广播舞台。为DataArrays.DataArray {字符串}

有没有办法修复/允许广播的DataArrays.DataArray {字符串}的舞台？无法广播舞台。为DataArrays.DataArray {字符串}

julia> using DataFrames 
julia> [email protected](["1776", "1895", " 0", " 1774", NA ]) 
5-element DataArrays.DataArray{String,1}: 
"1776" 
"1895" 
" 0" 
" 1774" 
NA  

julia> isna.(a) 
ERROR: MethodError: Cannot `convert` an object of type Bool to an object of type String 
This may have arisen from a call to the constructor String(...), 
since type constructors fall back to convert methods. 
in macro expansion at /home/ngphuoc/.julia/v0.5/DataArrays/src/broadcast.jl:60 [inlined] 
in macro expansion at ./cartesian.jl:64 [inlined] 
in (::DataArrays.#_F_#203)(::DataArrays.DataArray{String,1}, ::DataArrays.DataArray{String,1}) at /home/ngphuoc/.julia/v0.5/DataArrays/src/broadcast.jl:130 
in broadcast!(::Function, ::DataArrays.DataArray{String,1}, ::DataArrays.DataArray{String,1}) at /home/ngphuoc/.julia/v0.5/DataArrays/src/broadcast.jl:229 
in databroadcast(::Function, ::DataArrays.DataArray{String,1}, ::Vararg{DataArrays.DataArray{String,1},N}) at /home/ngphuoc/.julia/v0.5/DataArrays/src/broadcast.jl:235 
in broadcast(::Function, ::DataArrays.DataArray{String,1}) at /home/ngphuoc/.julia/v0.5/DataArrays/src/broadcast.jl:296 
in eval_user_input(::Any, ::Base.REPL.REPLBackend) at ./REPL.jl:64 
in macro expansion at ./REPL.jl:95 [inlined] 
in (::Base.REPL.##3#4{Base.REPL.REPLBackend})() at ./event.jl:68

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2017-08-01 Phuoc

该代码适用于我的系统（julia 0.6） - 你在哪个版本的julia上？ –

在0.5，DataArrays错误地假定的broadcast产生的元素类型将只需按照促销规则：试图这样做的时候，我得到了下面的错误。这个错误已经被固定在0.6。更新将是您最佳的行动方针。

当然，在0.5上仍然存在旧的向量化方法isna;如果你现在必须呆在那里，那可能是你最好的选择。它已被弃用，赞成isna.(a)广播0.6。

julia> isna(a) 
5-element BitArray{1}: 
false 
false 
false 
false 
    true

来源

2017-08-01 17:33:10

无法广播舞台。为DataArrays.DataArray {字符串}

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