R help - Jul 2009 - adjusting grid on Xaxis ticks

Hello,
I have been trying to plot correctly a graph for 2 month now, with no success.I
want to put a grid, adjusted on the X axis tickers.
Here is the way I build my X-Axis and my grid:


grid(11, NULL, col="grey40")
axis(2)  

# build the tickers on the beginning of each monthticks.at <-
seq(ISOdatetime(lastYear, 01, 01, hour=0, min=0, sec=0, tz="GMT"),
ISOdatetime(lastYear, 12, 31, hour=0, min=0, sec=0, tz="GMT"), by =
"months")
ticks.lab <- format(ticks.at, format = "%b")
Axis(ISOdatetime(lastYear, substr(index(xts1),6,7), substr(index(xts1),9,10),
hour=0, min=0, sec=0, tz="GMT"), at = ticks.at, side = 1, labels =
ticks.lab, las = 2)
box()


If anyone can help me, I would be very grateful.
Xavier
_________________________________________________________________

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is this what you want:

plot(0, xlim=as.POSIXct(c('2009-01-01', '2009-12-31')),
xaxt='n')
x <- seq(as.POSIXct('2009-01-01'), as.POSIXct('2009-12-13'),
by='1 month')
axis(1, at=x, labels=format(x, "%b"))
abline(v=x, lty=2)


On Thu, Jul 23, 2009 at 11:37 PM, wapita wapita<wapita at hotmail.com>
wrote:
>
> Hello,
> I have been trying to plot correctly a graph for 2 month now, with no
success.I want to put a grid, adjusted on the X axis tickers.
> Here is the way I build my X-Axis and my grid:
>
>
> grid(11, NULL, col="grey40")
> axis(2)
>
> # build the tickers on the beginning of each monthticks.at <-
seq(ISOdatetime(lastYear, 01, 01, hour=0, min=0, sec=0, tz="GMT"),
ISOdatetime(lastYear, 12, 31, hour=0, min=0, sec=0, tz="GMT"), by =
"months")
> ticks.lab <- format(ticks.at, format = "%b")
> Axis(ISOdatetime(lastYear, substr(index(xts1),6,7),
substr(index(xts1),9,10), hour=0, min=0, sec=0, tz="GMT"), at =
ticks.at, side = 1, labels = ticks.lab, las = 2)
> box()
>
>
> If anyone can help me, I would be very grateful.
> Xavier
> _________________________________________________________________
>
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>
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>
> ______________________________________________
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>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?