Dear All

I am new in spaital analysis but not new in R.
I am trying to work with T.Hengl's scripts download from

*http://spatial-analyst.net/book/Rscripts*

I have already download 9 files ( *.hdf ) as script download but
I have some error in the following script :

shell(cmd=paste(MRT, 'mrtmosaic -i ', MRT, 'TmpMosaic.prm
-s "0 1 0 0 0 0 0 0 0 0 0" -o ', workd, 'TmpMosaic.hdf', sep=""))

Warning: gctp_call :Environment Variables Not Found
:MRTDATADIR not defined
Error :GetinputGeocornerMosaic
Error: Converting lat/long coordinates to input project coordinates

Should I change some configurations setting in MRT files?

Thank you
-- 
Wongwatana Sombunying

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