Dear Sir/Madam,

I like to lay on geographical region on my the image plot of my study
like 5S to 25N and 20W to 60E. How do I do?
Here is the script I tried but not wrok for me.  Thank you for your help.
library(ncdf)
library(grid)
library(maps)
library(fields)
nc=open.ncdf('wrfout_mon')
T2=get.var.ncdf(nc,'T2')
lat=get.var.ncdf(nc,'x_2')
lon=get.var.ncdf(nc,'y_2')
time=get.var.ncdf(nc,'time')
# dim(T2)=c(147,121,8,125)
# T2.daily=apply(T2, c(1,2,4),mean)
T2.clim=apply(T2,c(1,2),mean)
image.plot(lat,lon,T2.clim)
map(interior=TRUE,add=TRUE)
Bedassa
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*Bedassa Regassa Cheneka*
*Adama Science and Technology Univesity*
*Natural Resource Management*
*P.O.BOX---193*
*Assela *
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