[R-sig-Geo] Grid of raster: increase resolution

[Komine]

Hi,
Thank Robert and Tom2 for your help,
I did what I wanted with rasterFromXYZ.
Now I open my shapefile to put the contours of my raster, but the raster
disappears. I used this code:

# Open raster
>Image<-read.table("C:\\Users\\Documents\\Nouveau\\Frequence.txt",sep="",dec=",",header=TRUE)    
>testo<-rasterFromXYZ(Image)  
>plot(testo)
>testo2 <- aggregate(testo,fact=10, fun=mean) 
>plot(testo2)
# open shapefiles= boundary 
>library (rgdal)
>test1<-readOGR(dsn="C:\\Users\\Documents\\DISC D\\Nouveau",layer="pays")
>plot(test1)

How to open the raster and the boundary in the same window.
Thank you in advance 

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