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0709
2011 Feb 14
1
How to group data by day
Hi everybody,
I'm a beginner in R and I'm having a hard time grouping my data by day.
The data are in this format:
id; words
2005-07-07T09:59:56Z; 35
2005-07-07T10:01:39Z; 13
2005-07-08T10:02:22Z; 1
2005-07-09T10:03:16Z; 23
2005-07-10T10:04:23Z; 39
2005-07-10T10:04:39Z; 15
I've transformed the date strings in dates with the function:
london$id <- transform(london$id, as.Date(london$id, format="%Y-%m-%d%T%H:%M:%S%Z"))...