Question about #1 zoo-faq
On 04/12/2010 5:40 AM, Alexander Salim wrote:
Hi all, I have a zoo object issue. When I create a zoo object I have following error message: "some methods for 'zoo' objects do not work if the index entries in 'order.by' are not unique." I checked if I have some duplicates in the 'Time' column, R says yes, but when I check the data set I can't explain why. Here is the code.
Remember that duplicated() doesn't return TRUE for all copies, only the second (and later ones). For example, duplicated(c(1,1,2,2,1)) returns [1] FALSE TRUE FALSE TRUE TRUE I believe the %in% operator works on zoo objects, so you can see all copies using x <- with(dataSet1, Time %in% Time[duplicated(Time)]) dataSet1[x,] Duncan Murdoch
sum(duplicated(dataSet1$Time))
[1] 5
x<- which(duplicated(dataSet1$Time))
dataSet1[x,]
Time fkl010z0 tre200s0 gre000z0 prestas0 rre150z0
tde200s0 ure200s0
4046 2009-03-29 02:10:00 0.5 3.0 0 942.1 0
1.9 92.7
4047 2009-03-29 02:20:00 0.3 2.7 0 942.1 0
1.7 93.4
4048 2009-03-29 02:30:00 0.6 2.8 0 942.2 0
1.8 92.9
4049 2009-03-29 02:40:00 0.4 2.8 0 942.3 0
1.6 92.0
4050 2009-03-29 02:50:00 0.8 2.8 0 942.2 0
1.6 92.1
Enclosed is a dput file with the data set. Thank you for your help. Regards, Alex
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