仕組みと動作原理
INDEX関数はExcel業務を効率化する代表的な関数です。Returns the value of a cell at a specific row and column intersection. 複雑な集計や参照処理を簡素化し、データ分析の精度と生産性を飛躍的に高めます。
構文.
標準Excel表記法=INDEX(array, row_num, [column_num])引数一覧.
この関数で指定できるすべての引数について詳しく解説します。
The range of cells or table to retrieve data from.
指定例:A2:B5The row position within the array.
指定例:2The column position within the array (default is 1).
初期値: 1具体的な計算例
ステップ別の実務シナリオMatrix Position Retrieval
Retrieve the item in row 2, column 2 of the table.
| Code | Name | Selected Item |
|---|---|---|
| 10 | Alpha | — |
| 20 | Beta | — |
| 30 | Gamma | — |
=INDEX(A2:B4, 2, 2)Evaluates INDEX over the sample table cells, placing the verified output in cell C2.
数式ジェネレーター
ウィザードを開く引数を入力するだけで、シートにそのまま貼り付けて使える数式を作成できます。
=INDEX()出力される値の特性
Returns "Beta" based on sample evaluation criteria and active cell references.
実務上のベストプラクティス
- Setting row_num or column_num to 0 returns the entire row or column.
よくあるミスと注意点
- Providing a row_num greater than the total rows in the array returns a #REF! error.
各プラットフォーム対応表
実際のExcelおよびGoogleスプレッドシートの計算エンジン仕様に基づいた検証結果です。
Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.
100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.
よくある質問と回答
技術解説Can I use INDEX across different worksheets in Excel?↓
Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =INDEX(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.
What is the most common reason for errors in INDEX?↓
Providing a row_num greater than the total rows in the array returns a #REF! error.
Does INDEX work identically in Google Sheets?↓
Yes, INDEX is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.