I have a number of plots that I'm trying to do using the lattice package,
unfortunately, they involve Posix values.
A small sample of the data is as follows:
Time TC.1 <Snipped>
1 2003-04-24 13:29:15 26.61
2 2003-04-24 13:29:30 26.48
3 2003-04-24 13:30:00 26.53
4 2003-04-24 13:30:30 27.85
<Snipped>
where
str(data)
`data.frame': 415 obs. of 22 variables:
$ Time :`POSIXlt', format: chr "2003-04-24 13:29:15" "2003-04-24 13:29:30"
"2003-04-24 13:30:00" "2003-04-24 13:30:30" ...
$ TC.1 : num 26.6 26.5 26.5 27.9 100.0 ...
<Snipped>
What I'm trying to do is plot TC.1 vs Time (which I can do easily), but I
need the xaxis to represent the Time instead of a numeric such as
105121000,etc.
I also need to rotate the times, but I think I have that figured out...
Any thoughts?
Shawn Way
Engineering Manager
Tanox, Inc.
Posix data in Lattice
2 messages · Shawn Way, Deepayan Sarkar
On Friday 25 April 2003 08:21 am, Shawn Way wrote:
I have a number of plots that I'm trying to do using the lattice package,
unfortunately, they involve Posix values.
A small sample of the data is as follows:
Time TC.1 <Snipped>
1 2003-04-24 13:29:15 26.61
2 2003-04-24 13:29:30 26.48
3 2003-04-24 13:30:00 26.53
4 2003-04-24 13:30:30 27.85
<Snipped>
where
str(data)
`data.frame': 415 obs. of 22 variables:
$ Time :`POSIXlt', format: chr "2003-04-24 13:29:15" "2003-04-24
13:29:30" "2003-04-24 13:30:00" "2003-04-24 13:30:30" ...
$ TC.1 : num 26.6 26.5 26.5 27.9 100.0 ...
<Snipped>
What I'm trying to do is plot TC.1 vs Time (which I can do easily), but I
need the xaxis to represent the Time instead of a numeric such as
105121000,etc.
Try converting Time to POSIXct and use it normally in a lattice call (maybe lattice should do the conversion itself). This should display the times properly, however, the formatting definitely needs some improvement. Let me know if this doesn't solve your problem. Deepayan