rm.dupl {meteo} | R Documentation |
This function finds point pairs with equal spatial coordinates from STFDF-class object and remove locations with less observations.
rm.dupl(obj, zcol = 1, zero.tol = 0)
obj |
STFDF-class object |
zcol |
variable column name, or column number, from obj@data |
zero.tol |
distance values less than or equal to this threshold value are considered as duplicates; units are those of the coordinates for projected data or unknown projection, or km if coordinates are defined to be longitute/latitude |
STFDF-class object with removed duplicate locations. Stations with less observation is removed, if number of observation is the same for two stations the first is removed.
Milan Kilibarda kili@grf.bg.ac.rs
# load observation - data frame data(dtempc) # load stations - data frame data(stations) str(dtempc) str(stations) # create STFDF temp <- meteo2STFDF(dtempc,stations) # create STFDF from 2 data frames nrow(temp@sp) # number of stations before removing dupl. temp2 <-rm.dupl(temp) nrow(temp2@sp) # number of stations after