Displaying 2 results from an estimated 2 matches for "datec".
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date
2012 Sep 18
2
Data frame divison by another data frame with common groups and different length
...5
10 07-08-2012 2 4 8
11 07-08-2012 2 4 4
12 07-08-2012 2 4 6
13 08-08-2012 1 1 9
14 08-08-2012 1 1 12
15 08-08-2012 1 1 7
(...)
> head(encounters)
datec samplec Bladen
1 07-08-2012 1 9
2 07-08-2012 1 6
3 07-08-2012 1 8
4 07-08-2012 1 8
5 07-08-2012 1 5
6 07-08-2012 1 4
7 07-08-2012 1 7
8 07-08-2012 1 6
9 07...
2005 Jul 28
4
CSV file and date. Dates are read as factors!
I am using read.csv to read a CSV file (produced by saving an Excel file
as a CSV file). The columns containing dates are being read as factors.
Because of this, I can not compute follow-up time, i.e.
Followup<-postDate-preDate. I would appreciate any suggestion that would
help me read the dates as dates and thus allow me to calculate follow-up
time.
Thanks
John
John Sorkin M.D., Ph.D.
Chief,