Hi Mehrdad, I have the same problem (running just GRASS dev - without calling it from R). Why can't v.distance update the current table (I tried using --overwrite but does not work either)? I do not want to create a new vector or a new table or print to stdout. Is this an undocumented new behaviour in dev or a bug? There's indeed an example in the manual page of v.distance that describes what we want to do; see **Point-in-polygon** example.
Vero El lun., 20 jul. 2020 a las 6:23, Mehrdad Varedi (<[email protected]>) escribió: > Hi Markus, > Sorry I am getting back to a conversation we had more than a month ago. I > found the error on v.distance in R. > > FYI, I run the same program under GRASS 7.8.3 with no problem, although > when the v.distance function is called from R under GRASS 7.9.dev I get > the following error: > > *"ERROR: At least one of the following options is required: <output>, > <table> and <-p>>"* > > Here is the code I use in R: > > execGRASS("v.distance",parameters= list( > from = NewLayerName, > from_layer = "1", > from_type = "point", > to = BasePointLayer, > to_layer = "1", > to_type = "point", > dmax = -1, > dmin = -1, > upload = "to_attr", > column = NewRefColumn, > to_column = UniqueID2BeTaken, > separator = "tab"), > flags=c('overwrite','verbose') > ) > > I still want to upload the results to the selected column, not to a new > table. How can I make it work in GRASS 7.9.dev? > by the way, the GRASS 7.8.3 is on my ubuntu computer, while the GRASS > 7.9.dev is running in a docker container with the same OS. > > I would appreciate to learn what should I add exactly to the command to > make it work with the new version of GRASS. If there is a bug that needs > some work , probably I should create a new container with the previous > version of GRASS. what do you recommend? > > Kind regards, > > Mehrdad > > > On Mon, May 25, 2020 at 5:12 AM Markus Neteler <[email protected]> wrote: > >> Hi Mehrdad, >> >> On Mon, May 25, 2020 at 10:24 AM Mehrdad Varedi <[email protected]> >> wrote: >> > >> > Hi Everyone, >> > I can run the R program with no problem from a Shiny app I have in >> Rstudio. Although when running the program from a container, I receive an >> error when running the v.distance and program halts. >> > >> > here is the error dump I receive, not so much informative, although I >> appreciate to know if you have ever seen such an issue: (FYI many other >> grass functions are executed before this error happens) >> > >> > Warning: Error in execGRASS: The command: >> > v.distance --overwrite --verbose from=WM_End from_layer=1 >> from_type=point to=WM_start to_layer=1 to_type=point dmax=0.5 dmin=-1 >> upload=to_attr column=LinkedWMID to_column=WMAINID separator=tab >> > produced an error (1) during execution: >> > Finds the nearest element in vector map 'to' for elements in vector map >> 'from'. >> > >> > Usage: >> > v.distance [-pas] from=name [from_layer=string] >> > [from_type=string[,string,...]] to=name [to_layer=string] >> > [to_type=string[,string,...]] [output=name] [dmax=value] [dmin=value] >> > upload=string[,string,...] [column=name[,name,...]] [to_column=name] >> > [table=name] [separator=character] [--overwrite] [--help] [--verbose] >> > [--quiet] [--ui] >> > >> > Flags: >> > -p Print output to stdout, don't update attribute table >> > -a Calculate distances to all features within the threshold >> > -s Print output as square matrix (only possible for one single >> upload variable) >> > >> > Parameters: >> > from Name of existing vector map (from) >> > from_layer Laye [... truncated] >> >> ^--- and chance to expand this "truncated"? Exactly therein you will >> find the error message :-) >> It is in the last line of the truncated part. >> >> Best, >> Markus >> > _______________________________________________ > grass-user mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/grass-user
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