Julia: readcsv和 readdlm

readcsv 是readdlm的简化。

julia> path ="C:\\Users\\Administrator\\Desktop\\IF01.csv";

julia> data1 =readcsv(path)
51828x8 Array{Float64,2}:

readcsv=>

julia> @time data1 =readcsv(path);
0.915586 seconds (1.24 M allocations: 41.768 MB, 1.04% gc time)

readdlm=>

julia> @time data2 =readdlm(path);
0.333389 seconds (206.94 k allocations: 10.510 MB, 2.45% gc time)

julia> @time data2 =readdlm(path,header=false);
0.325004 seconds (206.96 k allocations: 10.511 MB)

但是，似乎速度要上升很多，其实则不然，如果不加分隔符，得出来的是Array{Any,1},而不是Array{Any,2}.

这个速度和readcsv差不多，返回结果一样。

julia> @time data3 =readdlm(path,','header=false);