[R] How to put title Vertically

[stat stat]

Dear all R users,

Suppose,


Dear all R users,

Suppose,


pauto.cor = pacf(lh, plot=F)
max.lag = max(pauto.cor$lag)
min.lag = min(pauto.cor$lag)
centre = (max.lag - min.lag)/2
pauto.cor = pauto.cor$acf
pauto.cor = pauto.cor[-1]

par(mar=c(3,0,1,1))
barplot(pauto.cor, axes=F,xlim=c(max(pauto.cor),
min(pauto.cor)), space=0,
col="green4",border="green",horiz=T) 


#This plots PACF vertically

Now I want to put a title of above plot but NOT
horizontally rather Vertically.

Can anyone please tell me how to do that?

Thanks and regards,
stat

thanks in advance