On Nov 25, 2009, at 9:44 AM, John Lipkins wrote:
Hey R list,
A beginners question. How can I do the following:
In my research population it is possible that several items can appear
several times, measured on different moments in time. This is being
supplied
in a total list with all observa
shouldn't the first observation for Tree1 be " Tree1 leaves 01-01-2009"?
> x <- read.table(textConnection("Tree disease date
+ Tree1 leaves 01-01-2009
+ Tree2 roots 13-09-2009
+ Tree1 roots 24-10-2009"), header=TRUE)
> closeAllConnections()
> # split by "Tree" and take first observati
Hey R list,
A beginners question. How can I do the following:
In my research population it is possible that several items can appear
several times, measured on different moments in time. This is being supplied
in a total list with all observations identified by a number (per item) and
a moment of
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