Your assignments that look like... minx <- rain_data_UTM at bbox[1,1]
are not valid R statements - and that will cause an error. Instead, obtain a matrix of the bounding box using the bbox() function. Then extract your coordinates from that. I think you want... bb <- bbox(rain_data_UTM) minx <- bb[1,1] maxx <- bb[1,2] miny <- bb[2,1] maxy <- bb[2,2] If you haven't seen this, https://www.rspatial.org/ , it is well worth your time. There are a lot of other great resources about using spatial data in R. Try searching the Rseek.org. Like this https://rseek.org/?q=spatial+tutorials It is a gold mine. On Thu, Jan 9, 2020 at 1:42 PM Bakary Faty <bakaryf...@gmail.com> wrote: > Thank you for appreciated reply, > > I explane you exactly what I want to do with this R code attached. > I want to adapt this code to my data to build an isohyet map. > But i have some difficulties to adapt it to my case. > I will be very happy when you will help my to adapt this R code (attached) > to my case. > You can find attached the you R code, my data file and my sahefile of > watershed. > > Best regards > > > Le jeu. 9 janv. 2020 à 17:47, Ben Tupper <btup...@bigelow.org> a écrit : > >> Welcome to r-sig-geo! >> >> I don't think that you haven't provided us enough information so that we >> can help. On the other hand, does the example below using expand.grid help? >> >> minx <- 20 >> maxx <- 25 >> miny <- 31 >> maxy <- 36 >> pixel <- 1 >> grd <- expand.grid(x = seq(minx, maxx, by=pixel), y = seq(miny, maxy, >> by=pixel)) >> >> Ben >> >> On Thu, Jan 9, 2020 at 11:41 AM Bakary Faty <bakaryf...@gmail.com> wrote: >> >>> >>> Dear, >>> >>> I'm writing to express my wish to join R-sig-geo list users. >>> I was doing a search on the net to know how to build an isohyet map and >>> I came across this R code. >>> However, I stumbled upon a problem from the line : >>> grd <- expand.grid(x=seq(minx, maxx, by=pixel), y=seq(miny, maxy, >>> by=pixel)), >>> I get the following error message: >>> default method not implemented for type 'S4'. I want to know how resolve >>> this error. >>> >>> Also, I would like to ask you only at the line level: >>> minx <- rain_data_UTM at bbox[1,1] >>> maxx <- rain_data_UTM at bbox[1,2] >>> miny <- rain_data_UTM at bbox[2,1] >>> maxy <- rain_data_UTM at bbox[2,2], >>> if I should limit myself to "rain_data_UTM" or write completely: >>> rain_data_UTM at bbox[,]. >>> By the way, this is the pointfile I reconstructed. >>> You can find it attached to the mail. >>> >>> Thanks in advance >>> >>> Best regards >>> >>> >>> >>> Bakary >>> _______________________________________________ >>> R-sig-Geo mailing list >>> R-sig-Geo@r-project.org >>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo >>> >> >> >> -- >> Ben Tupper >> Bigelow Laboratory for Ocean Science >> West Boothbay Harbor, Maine >> http://www.bigelow.org/ >> https://eco.bigelow.org >> >> > > -- > > > > Bakary > -- Ben Tupper Bigelow Laboratory for Ocean Science West Boothbay Harbor, Maine http://www.bigelow.org/ https://eco.bigelow.org [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
