Dear R users, I have a quick question regarding creating an index for a zoo object. I am using R 2.12 on winxp.
I have read through the R archives searching for information on dates and time series analysis and nothing seems to cover my question. I am extracting data from a time series of remote sensing data. The frequency of the data is 16 days which means I cant use ts (ts likes months single days etc) and have thus been trying to replicate the following dates using ISOdatetime. 09/13/2005 09/29/2005 10/15/2005 10/31/2005 11/16/2005 12/02/2005 12/18/2005 So far, the only method I have found to be successful is the following a<-ISOdatetime(2005, 9, c(13,29), 0, 0, 0) b<-ISOdatetime(2005, 10, c(15,31), 0, 0, 0) c<-ISOdatetime(2005, 11, c(16), 0, 0, 0) d<-ISOdatetime(2005, 12, c(2,18), 0, 0, 0) e<-c(a,b,c,d) > sort(e) [1] "2005-09-13 SAST" "2005-09-29 SAST" "2005-10-15 SAST" "2005-10-31 SAST" [5] "2005-11-16 SAST" "2005-12-02 SAST" "2005-12-18 SAST" This is obviously highly convoluted and is not an appropriate solution. I would appreciate some advice as to how I would go about creating an index that starts at date 2005-09-13 and creates the next date 16 days ahead till the finishing date 2006-10-15. Also, given the nature of my time series would I be able to use ts instead of zoo? Many thanks for your input, Wesley -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
