
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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