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1. time format (score: 1): Author: "Dr K M MA" <kmma@ha.org.hk>; Date: Thu, 07 Aug 2003 16:09:42 +0800; Dear sir, Want to calculate the time difference in minutes of two columns; these two columns are input as a dataframe. The format is XX:YY (where XX are hours (24 hours) and YY are minutes). How shou; /archives/html/s-news/2003-08/msg00042.html (6,969 bytes)
2. time format (score: 1): Author: "Dr K M MA" <kmma@ha.org.hk>; Date: Fri, 08 Aug 2003 08:57:04 +0800; Sorry for reposting this quesiton. While reading one of the three replies I got, my pc went wrong with loss of emails of the last 2 days. Additional info/clarification of my problemam using SPlus 6.1; /archives/html/s-news/2003-08/msg00049.html (7,540 bytes)
3. Re: time format (score: 1): Author: "Henrik Aalborg Nielsen" <immhan@student.dtu.dk>; Date: Fri, 8 Aug 2003 08:26:58 +0200 (METDST); One posibility is to transform the columns into time spans, e.g.: timeSpan(c("10:30", "09:01"), in.format="%H:%M") and then just subtract the one from the other. The output is still a time span; usin; /archives/html/s-news/2003-08/msg00050.html (8,302 bytes)

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