hi, am specifying a variogram with 53 years by generating the time variable as follows: time <- as.POSIXct(paste0(1960:2012,"-01-01"), tz = "GMT") When i generate the map variagram, it comes with time in thousands (see attached map). how can i make sure that it gives time in years with a reasonable range? -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20130226/3b04aaf7/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: central africa Variogram1.png Type: image/png Size: 13628 bytes Desc: not available URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20130226/3b04aaf7/attachment.png>
space time variogram
3 messages · Jonesmus Wambua, Hodgess, Erin, Edzer Pebesma
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Erin, there is AFAIK in R no other way to represent a year then by its first Date, and that is what Jonesmus did. Jonesmus, I didn't see the map that you mentioned in your email. In the plot that you sent, lag1 refers to the first temporal lag. variogramST will assume time to be strictly regular regardless whether it is -- often it isn't (years, months, even days in local time zones have irregular length) but nearly is. In your plot, lag1 means time[1] to time[2], time[2] to time[3] etc, indicating one year to the next (whether this is 365 days, or 366). Please, in postings, give a complete record of what you did to obtain certain results -- this post might be complete speculative and hence completely useless to you.
On 02/26/2013 12:43 PM, Hodgess, Erin wrote:
Hello! I think it is showing days rather than years.
________________________________ From: r-sig-geo-bounces at r-project.org [r-sig-geo-bounces at r-project.org] on behalf of Jonesmus Wambua [jonesmus.mutua at gmail.com] Sent: Tuesday, February 26, 2013 4:03 AM To: r-sig-geo at r-project.org Subject: [R-sig-Geo] space time variogram hi, am specifying a variogram with 53 years by generating the time variable as follows: time <- as.POSIXct(paste0(1960:2012,"-01-01"), tz = "GMT") When i generate the map variagram, it comes with time in thousands (see attached map). how can i make sure that it gives time in years with a reasonable range? [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo at r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
Edzer Pebesma Institute for Geoinformatics (ifgi), University of M?nster Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251 8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de http://www.52north.org/geostatistics e.pebesma at wwu.de