回答編集履歴
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見直しキャンペーン中
test
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> 任意の行の配列を取り出せればstring.Joinでできると思うのですが…
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`string.Join`しました（効率はわかりません）
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[c# - How to get a dimension (slice) from a multidimensional array - Stack Overflow](https://stackoverflow.com/questions/4801990/how-to-get-a-dimension-slice-from-a-multidimensional-array) の丸パクリです^^;
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```
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```cs
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using System.Collections.Generic;
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using System.IO;
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namespace Questions241081
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{
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internal class Program
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{
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private static void Main()
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{
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double[,] Values = { { 1.1, 2.2 }, { 3.3, 4.4 } };
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using(var sw = new StreamWriter(@"test.csv", false))
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{
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for(var i = 0; i < Values.GetLength(0); ++i)
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{
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sw.WriteLine(string.Join(", ", Values.SliceRow(i)));
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}
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}
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}
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}
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// c# - How to get a dimension (slice) from a multidimensional array - Stack Overflow
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// https://stackoverflow.com/questions/4801990/how-to-get-a-dimension-slice-from-a-multidimensional-array
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internal static class ArrayExtensions
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{
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public static IEnumerable<T> SliceRow<T>(this T[,] array, int row)
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{
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for(var i = array.GetLowerBound(1); i <= array.GetUpperBound(1); i++)
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{
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yield return array[row, i];
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}
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}
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}
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}
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```
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シンプル化
test
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> 任意の行の配列を取り出せればstring.Joinでできると思うのですが…
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1
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`string.Join`しました（効率はわかりません）
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[c# - How to get a dimension (slice) from a multidimensional array - Stack Overflow](https://stackoverflow.com/questions/4801990/how-to-get-a-dimension-slice-from-a-multidimensional-array) の丸パクリです^^;
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```C#
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using System;
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using System.Collections.Generic;
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{
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double[,] Values = GetRandomArray();
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//出力例（ランダム）
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//0.88139194337716, 0.845414300377208, 0.425774484605423
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//1.71903742790177, 1.55735241042327, 1.09685895922448
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double[,] Values = { { 1.1, 2.2 }, { 3.3, 4.4 } };
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//出力
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//1, 2
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//3, 4
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@@ -62,33 +48,9 @@
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}
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// サイズ不定を表現しただけで本題とは関係ない
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private static double[,] GetRandomArray()
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{
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var r = new Random();
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var array = new double[r.Next(2, 5), r.Next(2, 5)];
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for(var i = 0; i < array.GetLength(0); i++)
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for(var j = 0; j < array.GetLength(1); j++)
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array[i, j] = r.NextDouble() + i;
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return array;
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}
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}
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// 本題はこれ
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// c# - How to get a dimension (slice) from a multidimensional array - Stack Overflow
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