Backup diff of Filter/Window (No. 1)

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• View the diff for visual.
• View the source.
• View the backup.
• Go to Filter/Window.
  • 1 (2023-08-15 (Tue) 15:03:00)

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.

- 窓関数を用いる理由
--  https://www.logical-arts.jp/archives/124