sp na.omit

Removes row or column NA's in sp object

sp.na.omit(x, col.name = NULL, margin = 1)

Arguments

x	Object of class SpatialPointsDataFrame OR SpatialPolygonsDataFrame
col.name	The name of a specific column to remove NA's from
margin	Margin (1,2) of data.frame 1 for rows or 2 for columns

Note

This function will remove all NA's in the object or NA's associated with a specific column.

Author

Jeffrey S. Evans <jeffrey_evans<at>tnc.org>

Examples

 library(sp)
 data(meuse)
 coordinates(meuse) <- ~x+y
   
 # Display rows with NA  
 meuse@data[!complete.cases(meuse@data),] 
#>    cadmium copper lead zinc  elev     dist   om ffreq soil lime landuse dist.m
#> 20    12.9     95  284 1052 6.860 0.000000 14.8     1    1    1    <NA>     10
#> 43     1.2     21   48  167 8.180 0.266220   NA     1    2    0      Ga    320
#> 44     1.7     22   65  176 8.694 0.211843   NA     1    2    0       W    260

 # Remove all NA's in rows (and associated points)
 meuse2 <- sp.na.omit(meuse) 
#> Deleting rows: 424320
   dim(meuse)
#> [1] 155  12
   dim(meuse2)
#> [1] 152  12
   
 # Plot deleted points in red
 plot(meuse, col='red', pch=20)
 plot(meuse2, col='black', pch=20, add=TRUE)

 # Remove NA's associated with specific column 
 meuse2 <- sp.na.omit(meuse, col.name = "om") 
   head(meuse@data)
#>   cadmium copper lead zinc  elev       dist   om ffreq soil lime landuse dist.m
#> 1    11.7     85  299 1022 7.909 0.00135803 13.6     1    1    1      Ah     50
#> 2     8.6     81  277 1141 6.983 0.01222430 14.0     1    1    1      Ah     30
#> 3     6.5     68  199  640 7.800 0.10302900 13.0     1    1    1      Ah    150
#> 4     2.6     81  116  257 7.655 0.19009400  8.0     1    2    0      Ga    270
#> 5     2.8     48  117  269 7.480 0.27709000  8.7     1    2    0      Ah    380
#> 6     3.0     61  137  281 7.791 0.36406700  7.8     1    2    0      Ga    470
   head(meuse2@data)
#>   cadmium copper lead zinc  elev       dist   om ffreq soil lime landuse dist.m
#> 1    11.7     85  299 1022 7.909 0.00135803 13.6     1    1    1      Ah     50
#> 2     8.6     81  277 1141 6.983 0.01222430 14.0     1    1    1      Ah     30
#> 3     6.5     68  199  640 7.800 0.10302900 13.0     1    1    1      Ah    150
#> 4     2.6     81  116  257 7.655 0.19009400  8.0     1    2    0      Ga    270
#> 5     2.8     48  117  269 7.480 0.27709000  8.7     1    2    0      Ah    380
#> 6     3.0     61  137  281 7.791 0.36406700  7.8     1    2    0      Ga    470