Hi
I am working with spgrass6 package and GRASS v.6.2. Everything was
fine until I tryed to read a vector file with readVECT6 (and other
related vector commands, like vInfo). When I ran these commands, the
problem immediately appeared (" Sorry, is not a valid flag" ).
Ok, the solution is easy:
- You have to download the spgrass package within a folder, in order
to install the package from this directory. You should type (being in R)
download.packages( "spgrass6" , destdir="/thef/folder/that/you/want/" )
in my computer, "the/folder/that/you/want/" =
"/home/jdgiraldo/R/downloaded_packages" (I had created
"/downloaded_packages" earlier ).
- Ok. Unzip the spgrass6_0.6-14.tar.gz file (this is my downloaded version).
- Open the vect_link.R file. It must be located in
"the/folder/that/you/want/spgrass6/R" folder.
- Now, go to the line 218. You'll find the next line
vinfo0 <- execGRASS("v.info", flags="t" , parameters=list(map=vname),
intern=TRUE, ignore.stderr=ignore.stderr)
and it should be changed into
vinfo0 <- execGRASS("v.info", flags="g" , parameters=list(map=vname),
intern=TRUE, ignore.stderr=ignore.stderr)
Did you see??? A little "t" is hateful. I think it was a typing mistake.
- Save and close the vect_link.R file.
- Install the modified spgrass6 package. Use
install.package( "/home/jdgiraldo/R/downloaded_packages/spgrass6" ,
repos=NULL )
- It's ready to use.
I hope this information will be useful.
Juan Diego
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