R create spatialpointdataframe
library(sp)
dat_orig <- read.table(text=" a b c d e lat lng
12 f2 23 dd 2d 15.6 80.9
12 g5 99 NA hh 20.9 10.9
13 g4 12 aa 3r3 1.2 81.8", header=TRUE, stringsAsFactors=FALSE)
dat <- dat_orig
coordinates(dat) <- ~lng+lat
dat
## coordinates a b c d e
## 1 (80.9, 15.6) 12 f2 23 dd 2d
## 2 (10.9, 20.9) 12 g5 99 <NA> hh
## 3 (81.8, 1.2) 13 g4 12 aa 3r3
dat_1 <- dat_orig
colnames(dat_1) <- c(colnames(dat_1)[1:5], "steve", "larry")
coordinates(dat_1) <- ~larry+steve
dat_1
## coordinates a b c d e
## 1 (80.9, 15.6) 12 f2 23 dd 2d
## 2 (10.9, 20.9) 12 g5 99 <NA> hh
## 3 (81.8, 1.2) 13 g4 12 aa 3r3