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julia メモ

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tutorial

http://samuelcolvin.github.io/JuliaByExample/
http://quant-econ.net/jl/learning_julia.html
https://en.wikibooks.org/wiki/Introducing_Julia
http://samuelcolvin.github.io/JuliaByExample/
http://learnxinyminutes.com/docs/julia/
https://github.com/chrisvoncsefalvay/learn-julia-the-hard-way

read
open("file_name") do f
    for line in eachline(f)
        print(line)
    end
end
read2_指定文字列の存在する行を抜き出す.
name="hogefuga" # 指定文字
f=readall("file_name")
dat=matchall(Regex("$name"".*"),f)
read3_データを行列に格納
f = open("file_name")
dat=readdlm(f)
read4_matchした行があったらループを終了
lines = open( "file_name", "r" ) do fp
    dat=readlines( fp )
    n=0
    for line in dat
        n+=1
        if( ismatch(r"$name", line)) 
            n+=1
            break
        end
    end
end

write
open("output.txt", "w") do f
    for n = 0:9
        write(f, string(n)"\n")
    end
end
中身のサイズが不明な配列(5個)を,配列の各要素に持たせる.
d=Array(Array,5)
行列の演算
A.*B        # 要素ごとの積
A.^B        # 要素ごとにB乗する.
dot(A,B)    # 内積
A'         # 転置
式展開
"$a"
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