[R] Dates and times from Excel
d.scott at auckland.ac.nz
Mon Feb 23 02:26:17 CET 2009
I have used xlsReadWrite to read data from an Excel spreadsheet.
I had a problem with converting times of the day so that I could create
POSIXct date-time objects. I was wondering if there was a better
Excel stores times of the day as fractions of a day so I wrote a function
to convert the fraction to a number of seconds, extract the hours, minutes
and seconds and output it in ISO standard format (%H:%M:%S).
Given a date obtained from an Excel date using as.Date I could then make
up my POSIXct date-time objects.
This seems like it would be such a standard operation that there may be
existing solutions that I have missed.
Any comments, advice?
David Scott Department of Statistics
The University of Auckland, PB 92019
Auckland 1142, NEW ZEALAND
Phone: +64 9 373 7599 ext 85055 Fax: +64 9 373 7018
Email: d.scott at auckland.ac.nz
Graduate Officer, Department of Statistics
Director of Consulting, Department of Statistics
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