Hello,
Try the following.
timestamps <- as.POSIXct(Sys.Date()) + sample(24*60*60, 1e3, TRUE)
h1 <- cut(timestamps, breaks="hour")
h2 <- cut(timestamps, breaks="15 mins")
op <- par(mfrow=c(1, 2))
hist(as.integer(h1))
hist(as.integer(h2))
par(op)
Hope this helps,
Rui Barradas
Em 16-07-2012 09:47, e-letter escreveu:
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.
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
