pDates<-as.POSIXct(times,format="%H:%M:%S")
> hist(pDates,"hours")

On 16.07.2012, at 10:47, e-letter wrote:

> Readers,
> 
> A data set consists of time-stamp values:
> 
> 00:00:00
> 23:11:00
> 06:22:00
> 
> The data set was imported:
> 
> timestamps<-read.table("path/to/timestampsvalues")
> hist(timestamps)
> 
> ...error... x must be numeric
> 
> Then tried:
> 
> plot(timestamps).
> 
> How to adjust the graph to create a histogram where the intervals
> ranges can be specified, e.g. intervals of 60 minutes?
> 
> Thanks in advance.
> 
> ______________________________________________
> 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.


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