📂Julia

How to Output a 2D Array to a CSV File in Julia

Code

using CSV, DataFrames

A = rand(1:10, 10)
B = zeros(10)

AB = DataFrame(hcat(A,B), ["A", "B"])

CSV.write("AB.csv", AB)

The write function of the CSV package allows you to easily output a two-dimensional array. A, B are one-dimensional arrays, which are combined using the hcat function to transform into a dataframe.

Execution Result

julia> using CSV, DataFrames

julia> A = rand(1:10, 10)
10-element Array{Int64,1}:
  8
  5
  4
  3
  6
  4
 10
  6
  2
  9

julia> B = zeros(10)
10-element Array{Float64,1}:
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0
 0.0

julia> AB = DataFrame(hcat(A,B), ["A", "B"])
10×2 DataFrame
 Row │ A        B       
     │ Float64  Float64
─────┼──────────────────
   1 │     8.0      0.0
   2 │     5.0      0.0
   3 │     4.0      0.0
  ⋮  │    ⋮        ⋮
   9 │     2.0      0.0
  10 │     9.0      0.0
          5 rows omitted

julia> CSV.write("AB.csv", AB)
"AB.csv"

Here is the actual csv file that was output.

See Also

• How to fix broken characters when outputting CSV CSV.write(bom = true)

Environment

• OS: Windows
• julia: v1.6.3