Package: unexcel 0.2.0

unexcel: Revert Spreadsheet Date Auto-Conversion to the Numbers Typed

Spreadsheets silently turn entries such as '30.3' into dates, so the imported data carry date serials instead of the numbers that were typed. Reading the workbook directly recovers those numbers without guesswork: an 'xlsx' file states its own date system, and records which cells are formatted as dates and in which field order, so the values to repair are identified from the file rather than inferred from their magnitude. Functions are also provided for data already imported, where that evidence is no longer available, using conservative and configurable detection.

Authors:Hercules R. Freitas [aut, cre, cph]