som - Automatically select SOM_GRID in R -


i trying run som algorithm in r using kohenen package. in have define xdim, ydim dimension manually. refer below code:

som_grid <- somgrid(xdim=5, ydim=6, topo="hexagonal")  som_model <- som(data_train_matrix,               grid=som_grid,               keep.data = true)

my questions:

  1. is there method automatically selects dimensions based on data
  2. can explain logic behind selection can write function in r identify dimensions automatically

i'm not in r think can you:

#consider dummy xdim , ydim data. x<-c(seq(0,5,by=0.5)) y<-c(seq(0,6,by=0.5))  ## determine sector starting , end points. a<-rbind(1,2,3,4,5) b<-rbind(1,2,3,4,5,6)  sectors<-cbind(a,b)  sectors  ## see table of sector.

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