将Julia数组转换为数据框 [英] Convert Julia array to dataframe
问题描述
julia> y = convert(DataFrame,x)
convert
ERROR:没有匹配的方法convert(:: Type {DataFrame},:: Array {Float64,2})
转换为base.jl:13
当我尝试 DataFrame(x)
,转换有效,但我抱怨转换已被弃用。
julia> DataFrame(x)
警告:DataFrame(:: Matrix,:: Vector))已被弃用,请在/Users/Matthew/.julia/v0.3/DataFrames/src的DataFrame中使用convert(DataFrame,Matrix) /deprecated.jl:54(重复2次)
是否有其他方法我应该注意保持我的代码一致? p>
编辑:
朱莉娅0.3.2,
DataFrames 0.5.10
OSX 10.9.5
julia> x = rand(4,4)
4x4数组{Float64,2}:
0.467882 0.466358 0.28144 0.0151388
0.22354 0.358616 0.669564 0.828768
0.475064 0.187992 0.584741 0.0543435
0.0592643 0.345138 0.704496 0.844822
julia> convert(DataFrame,x)
错误:`convert`没有匹配convert(:: Type {DataFrame},:: Array {Float64,2})在base.jl中转换的方法:13
我已经被同一个问题混淆了很多次,最终意识到这个问题通常与阵列的格式相关,并且可以通过在转换前简单地转换数组来轻松解决。
简而言之,我建议:
julia> convert(DataFrame,x')
I have an array X that I'd like to convert to a dataframe. Upon recommendation from the web, I tried converting to a dataframe and get the following error.
julia> y=convert(DataFrame,x)
ERROR:
converthas no method matching convert(::Type{DataFrame}, ::Array{Float64,2})
in convert at base.jl:13
When I try DataFrame(x)
, the conversion works but i get a complaint that the conversion is deprecated.
julia> DataFrame(x)
WARNING: DataFrame(::Matrix, ::Vector)) is deprecated, use convert(DataFrame, Matrix) instead in DataFrame at /Users/Matthew/.julia/v0.3/DataFrames/src/deprecated.jl:54 (repeats 2 times)
Is there another method I should be aware of to keep my code consistent?
EDIT: Julia 0.3.2, DataFrames 0.5.10 OSX 10.9.5
julia> x=rand(4,4)
4x4 Array{Float64,2}:
0.467882 0.466358 0.28144 0.0151388
0.22354 0.358616 0.669564 0.828768
0.475064 0.187992 0.584741 0.0543435
0.0592643 0.345138 0.704496 0.844822
julia> convert(DataFrame,x)
ERROR: `convert` has no method matching convert(::Type{DataFrame}, ::Array{Float64,2}) in convert at base.jl:13
I've been confounded by the same issue a number of times, and eventually realized the issue is often related to the format of the array, and is easily resolved by simply transposing the array prior to conversion.
In short, I recommend:
julia> convert(DataFrame, x')
这篇关于将Julia数组转换为数据框的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!