我有12個點顯示月平均。我想打月份x
。我試着用下面的代碼。它會在x
軸上打勾12個刻度線,但不要輸入名稱。我無法找到錯誤?格式化x軸
{monthly_average<-aggregate(
dat.xts$CLPTHV43_Avr.wind.speed.1.m.s..91.,
as.yearmon(index(dat.xts)),
"mean",
na.rm=TRUE)
plot(monthly_average,
pch=20,
ylim=c(0,11),
type="o",
main="Average Monthly Wind Spped",
xlab="Months",
ylab="Wind Speed(m/s)")
axis(side = 1,
at=1:12,
lab=c( "July 2010",
"Aug 2010",
"Sep 2010",
"Oct 2010",
"Nov 2010",
"Dec 2010",
"Jan 2011",
"Feb 2011",
"Mar 2011",
"Apr 2011",
"May 2011",
"Jun 2011"))}
一些示例數據會很好。 –