Allen,
I can reproduce the problems you described, but I can't find where the
problem is (in axis.POSIXct). Anyway, here is an alternative I wrote a
while ago:
# for base graphics
timeAxis <- function(side, at=NULL, labels=TRUE, ..., tz="GMT") {
range <- par("usr")[if (side%%2) 1:2 else 3
I recently called plot(x,y) where x was an array of POSIXct timestamps,
and was pleasantly surprised that it produced a nice plot right out of
the box:
z <- as.POSIXct(c("2006-10-26 08:00:00 EDT","2007-10-25 12:00:00 EDT"))
x <- seq(z[1],z[2],len=100)
y <- 1:100
plot(x,y,type="l")
The X axis ha
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