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write_xlsx s a gem to create a new file in the Excel 2007+ XLSX format, and you can use the same interface as writeexcel gem. The WriteXLSX supports the following features: * Multiple worksheets * Strings and numbers * Unicode text * Rich string formats * Formulas (including array formats) * cell formatting * Embedded images * Charts * Autofilters * Data validation * Hyperlinks * Defined names * Grouping/Outlines * Cell comments * Panes * Page set-up and printing options write_xlsx uses the same interface as writeexcel gem. documentation is not completed, but writeexcel’s documentation will help you. See http://writeexcel.web.fc2.com/ And you can find many examples in this gem.