xlsReadWrite is an R package which allows to read and write Excel files natively, without any dependencies such as Excel, ODBC drivers, Perl, Python or Java. Supported is the .xls file format (BIFF8). Our own code is free (GPL-2) but we also use proprietary code which can only be distributed legally in compiled form and the package contains a binary library. (The CRAN version generates a placeholder dll/so and the regular library must be downloaded with 'xls.getshlib()').
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