我正在 MyDFvector 中使用 dfx 创建变量, 但它返回 Vector[Vector] 但我只想要一个 DataFrame。 有什么帮助吗?
using DataFrames
# create some DataFrames
mydfbase = DataFrame(a=[41, 41, 41, 41, 41, 41])
mydf1 = DataFrame(a=1:6)
mydf2 = DataFrame(a=7:12)
mydf3 = DataFrame(a=13:18)
# put into a vector
MyDFvector = [mydf1, mydf2, mydf3]
println(typeof(MyDFvector))
#
RawDiff = [mydfbase.a .- dfx.a for dfx in MyDFvector]
println(typeof(RawDiff))
println(RawDiff)
mydfWant = DataFrame(a=[40, 39, 38, 37, 36, 35], b=[34, 33, 32, 31, 30, 29], c=[28, 27, 26, 25, 24, 23])
println(typeof(mydfWant))
println(mydfWant)
'= = = = = = = = = = = Terminal output
What I got-->
Vector{DataFrame}
Vector{Vector{Int64}}
[[40, 39, 38, 37, 36, 35], [34, 33, 32, 31, 30, 29], [28, 27, 26, 25, 24, 23]]
What I Want--> (any generated column names)
DataFrame
6×3 DataFrame
Row │ a b c
│ Int64 Int64 Int64
─────┼─────────────────────
1 │ 40 34 28
2 │ 39 33 27
3 │ 38 32 26
4 │ 37 31 25
5 │ 36 30 24
6 │ 35 29 23
似乎以下内容会让您
mydfWant
:
julia> DataFrame(stack(RawDiff), :auto)
6×3 DataFrame
Row │ x1 x2 x3
│ Int64 Int64 Int64
─────┼─────────────────────
1 │ 40 34 28
2 │ 39 33 27
3 │ 38 32 26
4 │ 37 31 25
5 │ 36 30 24
6 │ 35 29 23
要获得 Julia 中的许多有用帮助,请按“?”在 REPL 中,然后函数或类型非常有帮助(例如这个答案中的函数
stack
)。